1998-11-03 Senatorial Election Results for Iowa (Class 3)

Click on a county in the table or the map to see demographic data for that county.

County	Turnout	Charles Grassley* (R)		David Osterberg (D)		Susan Marcus (Natural Law)		Margaret Trowe (Socialist Workers)		Other		Margin	TOTAL
Adair	54%	2,665	78.1%	715	21.0%	21	0.6%	11	0.3%	0	0.0%	1,950	3,412
Adams	48%	1,252	74.4%	406	24.1%	16	1.0%	8	0.5%	0	0.0%	846	1,682
Allamakee	43%	3,395	73.0%	1,201	25.8%	36	0.8%	16	0.3%	1	0.0%	2,194	4,649
Appanoose	38%	2,733	68.9%	1,197	30.2%	24	0.6%	10	0.3%	2	0.1%	1,536	3,966
Audubon	49%	1,788	70.8%	726	28.8%	3	0.1%	8	0.3%	0	0.0%	1,062	2,525
Benton	48%	6,200	71.2%	2,438	28.0%	56	0.6%	10	0.1%	0	0.0%	3,762	8,704
Black Hawk	41%	25,792	65.4%	13,365	33.9%	192	0.5%	73	0.2%	15	0.0%	12,427	39,437
Boone	46%	5,927	66.3%	2,915	32.6%	73	0.8%	24	0.3%	1	0.0%	3,012	8,940
Bremer	47%	6,375	77.6%	1,787	21.8%	37	0.5%	14	0.2%	1	0.0%	4,588	8,214
Buchanan	49%	5,228	71.5%	2,008	27.5%	61	0.8%	17	0.2%	1	0.0%	3,220	7,315
Buena Vista	37%	4,266	76.3%	1,286	23.0%	23	0.4%	15	0.3%	1	0.0%	2,980	5,591
Butler	43%	4,007	80.1%	959	19.2%	16	0.3%	20	0.4%	1	0.0%	3,048	5,003
Calhoun	45%	2,989	77.2%	845	21.8%	27	0.7%	9	0.2%	0	0.0%	2,144	3,870
Carroll	46%	5,243	73.9%	1,785	25.2%	50	0.7%	16	0.2%	1	0.0%	3,458	7,095
Cass	44%	3,926	78.9%	998	20.1%	26	0.5%	22	0.4%	1	0.0%	2,928	4,973
Cedar	46%	4,254	69.5%	1,812	29.6%	34	0.6%	25	0.4%	0	0.0%	2,442	6,125
Cerro Gordo	46%	11,065	67.9%	5,127	31.4%	77	0.5%	36	0.2%	1	0.0%	5,938	16,306
Cherokee	47%	3,542	75.3%	1,113	23.7%	32	0.7%	13	0.3%	1	0.0%	2,429	4,701
Chickasaw	56%	4,175	77.6%	1,159	21.5%	29	0.5%	13	0.2%	4	0.1%	3,016	5,380
Clarke	52%	2,412	69.5%	1,004	28.9%	45	1.3%	9	0.3%	2	0.1%	1,408	3,472
Clay	45%	4,306	73.9%	1,490	25.6%	25	0.4%	8	0.1%	0	0.0%	2,816	5,829
Clayton	46%	4,724	73.6%	1,658	25.8%	24	0.4%	15	0.2%	0	0.0%	3,066	6,421
Clinton	40%	9,379	62.6%	5,544	37.0%	39	0.3%	25	0.2%	1	0.0%	3,835	14,988
Crawford	40%	3,723	76.1%	1,143	23.4%	20	0.4%	7	0.1%	0	0.0%	2,580	4,893
Dallas	49%	9,482	69.3%	4,057	29.7%	109	0.8%	28	0.2%	5	0.0%	5,425	13,681
Davis	47%	2,014	69.2%	855	29.4%	35	1.2%	5	0.2%	0	0.0%	1,159	2,909
Decatur	51%	2,538	74.6%	827	24.3%	29	0.9%	7	0.2%	1	0.0%	1,711	3,402
Delaware	46%	4,537	76.3%	1,377	23.2%	21	0.4%	9	0.2%	0	0.0%	3,160	5,944
Des Moines	40%	6,642	52.1%	6,047	47.4%	63	0.5%	8	0.1%	0	0.0%	595	12,760
Dickinson	48%	4,220	70.8%	1,675	28.1%	39	0.7%	25	0.4%	3	0.1%	2,545	5,962
Dubuque	41%	17,166	63.0%	9,824	36.0%	203	0.7%	55	0.2%	5	0.0%	7,342	27,253
Emmet	41%	2,290	66.6%	1,118	32.5%	25	0.7%	5	0.1%	0	0.0%	1,172	3,438
Fayette	46%	5,520	73.8%	1,894	25.3%	40	0.5%	24	0.3%	1	0.0%	3,626	7,479
Floyd	47%	4,452	75.0%	1,423	24.0%	50	0.8%	12	0.2%	1	0.0%	3,029	5,938
Franklin	47%	3,129	80.7%	722	18.6%	16	0.4%	6	0.2%	4	0.1%	2,407	3,877
Fremont	44%	1,957	74.6%	633	24.1%	25	1.0%	6	0.2%	1	0.0%	1,324	2,622
Greene	50%	2,771	71.7%	1,053	27.2%	35	0.9%	6	0.2%	1	0.0%	1,718	3,866
Grundy	52%	4,000	83.5%	779	16.3%	8	0.2%	4	0.1%	1	0.0%	3,221	4,792
Guthrie	50%	3,113	72.2%	1,152	26.7%	37	0.9%	6	0.1%	1	0.0%	1,961	4,309
Hamilton	47%	4,165	72.7%	1,516	26.5%	41	0.7%	6	0.1%	0	0.0%	2,649	5,728
Hancock	47%	3,237	77.8%	896	21.5%	13	0.3%	16	0.4%	0	0.0%	2,341	4,162
Hardin	48%	5,151	75.6%	1,621	23.8%	25	0.4%	17	0.2%	0	0.0%	3,530	6,814
Harrison	39%	3,186	72.0%	1,161	26.2%	59	1.3%	18	0.4%	1	0.0%	2,025	4,425
Henry	47%	4,991	70.5%	2,009	28.4%	58	0.8%	24	0.3%	2	0.0%	2,982	7,084
Howard	51%	2,749	74.5%	901	24.4%	37	1.0%	4	0.1%	0	0.0%	1,848	3,691
Humboldt	49%	3,057	80.1%	724	19.0%	28	0.7%	7	0.2%	0	0.0%	2,333	3,816
Ida	49%	2,346	81.4%	512	17.8%	12	0.4%	12	0.4%	0	0.0%	1,834	2,882
Iowa	51%	4,339	75.3%	1,363	23.6%	53	0.9%	8	0.1%	1	0.0%	2,976	5,764
Jackson	42%	4,330	68.5%	1,946	30.8%	38	0.6%	11	0.2%	0	0.0%	2,384	6,325
Jasper	50%	9,122	65.7%	4,625	33.3%	110	0.8%	34	0.2%	2	0.0%	4,497	13,893
Jefferson	52%	3,763	59.0%	1,354	21.2%	1,234	19.4%	13	0.2%	9	0.1%	2,409	6,373
Johnson	39%	17,901	53.3%	15,138	45.1%	342	1.0%	173	0.5%	15	0.0%	2,763	33,569
Jones	45%	5,038	73.6%	1,739	25.4%	56	0.8%	15	0.2%	1	0.0%	3,299	6,849
Keokuk	44%	2,824	75.0%	907	24.1%	28	0.7%	6	0.2%	0	0.0%	1,917	3,765
Kossuth	52%	4,894	73.3%	1,713	25.7%	50	0.7%	14	0.2%	2	0.0%	3,181	6,673
Lee	40%	5,836	50.1%	5,636	48.4%	138	1.2%	33	0.3%	11	0.1%	200	11,654
Linn	47%	42,387	64.5%	22,759	34.6%	433	0.7%	104	0.2%	17	0.0%	19,628	65,700
Louisa	39%	2,336	69.0%	1,010	29.8%	25	0.7%	15	0.4%	1	0.0%	1,326	3,387
Lucas	43%	2,250	74.1%	769	25.3%	17	0.6%	2	0.1%	0	0.0%	1,481	3,038
Lyon	46%	3,313	85.0%	554	14.2%	18	0.5%	11	0.3%	0	0.0%	2,759	3,896
Madison	54%	3,794	70.6%	1,498	27.9%	67	1.2%	15	0.3%	0	0.0%	2,296	5,374
Mahaska	42%	5,443	78.4%	1,449	20.9%	36	0.5%	15	0.2%	4	0.1%	3,994	6,947
Marion	42%	7,107	71.9%	2,737	27.7%	24	0.2%	18	0.2%	2	0.0%	4,370	9,888
Marshall	48%	9,679	69.1%	4,203	30.0%	99	0.7%	25	0.2%	4	0.0%	5,476	14,010
Mills	36%	2,909	77.2%	805	21.4%	39	1.0%	11	0.3%	2	0.1%	2,104	3,766
Mitchell	53%	3,198	74.8%	1,044	24.4%	18	0.4%	17	0.4%	0	0.0%	2,154	4,277
Monona	47%	2,590	72.2%	947	26.4%	34	0.9%	18	0.5%	0	0.0%	1,643	3,589
Monroe	47%	1,952	69.5%	820	29.2%	24	0.9%	14	0.5%	0	0.0%	1,132	2,810
Montgomery	45%	3,251	80.8%	726	18.0%	36	0.9%	12	0.3%	1	0.0%	2,525	4,026
Muscatine	35%	7,175	67.3%	3,365	31.6%	76	0.7%	39	0.4%	3	0.0%	3,810	10,658
O'Brien	43%	3,998	82.4%	828	17.1%	18	0.4%	8	0.2%	1	0.0%	3,170	4,853
Osceola	42%	1,810	82.5%	359	16.4%	18	0.8%	6	0.3%	0	0.0%	1,451	2,193
Page	42%	4,417	81.9%	917	17.0%	39	0.7%	19	0.4%	1	0.0%	3,500	5,393
Palo Alto	46%	2,419	67.6%	1,141	31.9%	11	0.3%	5	0.1%	0	0.0%	1,278	3,576
Plymouth	38%	5,461	81.2%	1,245	18.5%	10	0.1%	10	0.1%	0	0.0%	4,216	6,726
Pocahontas	45%	2,225	76.0%	672	23.0%	20	0.7%	5	0.2%	6	0.2%	1,553	2,928
Polk	47%	81,972	64.7%	43,498	34.3%	810	0.6%	445	0.4%	55	0.0%	38,474	126,780
Pottawattamie	33%	14,601	68.6%	6,355	29.8%	212	1.0%	106	0.5%	17	0.1%	8,246	21,291
Poweshiek	44%	4,324	67.6%	1,983	31.0%	58	0.9%	34	0.5%	2	0.0%	2,341	6,401
Ringgold	56%	1,789	77.1%	507	21.9%	13	0.6%	10	0.4%	1	0.0%	1,282	2,320
Sac	49%	3,454	79.5%	859	19.8%	30	0.7%	4	0.1%	0	0.0%	2,595	4,347
Scott	40%	30,855	66.2%	15,244	32.7%	356	0.8%	103	0.2%	16	0.0%	15,611	46,574
Shelby	44%	3,225	76.1%	994	23.4%	13	0.3%	7	0.2%	0	0.0%	2,231	4,239
Sioux	44%	9,017	90.9%	880	8.9%	13	0.1%	12	0.1%	1	0.0%	8,137	9,923
Story	39%	16,003	64.4%	8,532	34.4%	181	0.7%	100	0.4%	15	0.1%	7,471	24,831
Tama	49%	4,697	72.9%	1,689	26.2%	43	0.7%	14	0.2%	1	0.0%	3,008	6,444
Taylor	46%	1,847	75.4%	570	23.3%	23	0.9%	9	0.4%	1	0.0%	1,277	2,450
Union	46%	3,204	73.2%	1,144	26.1%	20	0.5%	12	0.3%	0	0.0%	2,060	4,380
Van Buren	49%	2,036	71.8%	762	26.9%	33	1.2%	6	0.2%	0	0.0%	1,274	2,837
Wapello	43%	7,046	60.1%	4,492	38.3%	142	1.2%	34	0.3%	5	0.0%	2,554	11,719
Warren	49%	9,414	66.7%	4,577	32.4%	82	0.6%	42	0.3%	3	0.0%	4,837	14,118
Washington	45%	4,946	72.9%	1,754	25.9%	71	1.0%	13	0.2%	1	0.0%	3,192	6,785
Wayne	46%	1,697	70.8%	697	29.1%	0	0.0%	2	0.1%	0	0.0%	1,000	2,396
Webster	42%	8,638	68.0%	3,945	31.0%	101	0.8%	24	0.2%	3	0.0%	4,693	12,711
Winnebago	46%	3,103	74.9%	1,001	24.2%	24	0.6%	16	0.4%	0	0.0%	2,102	4,144
Winneshiek	41%	4,967	73.5%	1,730	25.6%	35	0.5%	23	0.3%	0	0.0%	3,237	6,755
Woodbury	36%	18,148	68.5%	8,079	30.5%	153	0.6%	111	0.4%	8	0.0%	10,069	26,499
Worth	54%	2,341	72.6%	841	26.1%	37	1.1%	4	0.1%	1	0.0%	1,500	3,224
Wright	42%	3,316	73.5%	1,190	26.4%	6	0.1%	1	0.0%	1	0.0%	2,126	4,514
TOTAL	44%	648,480	68.4%	289,049	30.5%	7,561	0.8%	2,542	0.3%	275	0.0%	359,431	947,907
Total R vote: 648,480 (68.4%)      Total D vote: 289,049 (30.5%)      Total Other vote: 10,378 (1.1%)
* incumbent
Campaign finance data for this election**:
Total Disbursements:		$3,743,873		$165,429		$0		$0
Total Receipts:		$4,531,099		$165,655		$0		$0
Cash on Hand:		$1,610,727		$225		$0		$0
Contributions by Candidate:		$0		$0		$0		$0
Loans by Candidate:		$0		$1,000		$0		$0
Total Individual Contributions:		$1,819,615		$136,274		$0		$0
Party Contributions:		$17,823		$2,221		$0		$0
Other Committee Contributions:		$1,556,765		$25,200		$0		$0
Transfers from Other Committees:		$730,166		$0		$0		$0
Independent Expenditures Supporting:		$10,149		$0		$0		$0
Independent Expenditures Opposing:		$0		$0		$0		$0
Net Independent Expenditures:		$10,149		$0		$0		$0
Net Spending:		$3,754,022		$165,429		$0		$0

1998 Senate class 3, Adair County
Candidate	Votes	Pct
Charles Grassley* (R)	2,665	78.1%
David Osterberg (D)	715	21.0%
Susan Marcus (NtL)	21	0.6%
Margaret Trowe (SW)	11	0.3%
TOTAL	3,412
Turnout: 54%

1998 Senate class 3, Adams County
Candidate	Votes	Pct
Charles Grassley* (R)	1,252	74.4%
David Osterberg (D)	406	24.1%
Susan Marcus (NtL)	16	1.0%
Margaret Trowe (SW)	8	0.5%
TOTAL	1,682
Turnout: 48%

1998 Senate class 3, Allamakee County
Candidate	Votes	Pct
Charles Grassley* (R)	3,395	73.0%
David Osterberg (D)	1,201	25.8%
Susan Marcus (NtL)	36	0.8%
Margaret Trowe (SW)	16	0.3%
TOTAL	4,649
Turnout: 43%

1998 Senate class 3, Appanoose County
Candidate	Votes	Pct
Charles Grassley* (R)	2,733	68.9%
David Osterberg (D)	1,197	30.2%
Susan Marcus (NtL)	24	0.6%
Margaret Trowe (SW)	10	0.3%
TOTAL	3,966
Turnout: 38%

1998 Senate class 3, Audubon County
Candidate	Votes	Pct
Charles Grassley* (R)	1,788	70.8%
David Osterberg (D)	726	28.8%
Susan Marcus (NtL)	3	0.1%
Margaret Trowe (SW)	8	0.3%
TOTAL	2,525
Turnout: 49%

1998 Senate class 3, Benton County
Candidate	Votes	Pct
Charles Grassley* (R)	6,200	71.2%
David Osterberg (D)	2,438	28.0%
Susan Marcus (NtL)	56	0.6%
Margaret Trowe (SW)	10	0.1%
TOTAL	8,704
Turnout: 48%

1998 Senate class 3, Black Hawk County
Candidate	Votes	Pct
Charles Grassley* (R)	25,792	65.4%
David Osterberg (D)	13,365	33.9%
Susan Marcus (NtL)	192	0.5%
Margaret Trowe (SW)	73	0.2%
TOTAL	39,437
Turnout: 41%

1998 Senate class 3, Boone County
Candidate	Votes	Pct
Charles Grassley* (R)	5,927	66.3%
David Osterberg (D)	2,915	32.6%
Susan Marcus (NtL)	73	0.8%
Margaret Trowe (SW)	24	0.3%
TOTAL	8,940
Turnout: 46%

1998 Senate class 3, Bremer County
Candidate	Votes	Pct
Charles Grassley* (R)	6,375	77.6%
David Osterberg (D)	1,787	21.8%
Susan Marcus (NtL)	37	0.5%
Margaret Trowe (SW)	14	0.2%
TOTAL	8,214
Turnout: 47%

1998 Senate class 3, Buchanan County
Candidate	Votes	Pct
Charles Grassley* (R)	5,228	71.5%
David Osterberg (D)	2,008	27.5%
Susan Marcus (NtL)	61	0.8%
Margaret Trowe (SW)	17	0.2%
TOTAL	7,315
Turnout: 49%

1998 Senate class 3, Buena Vista County
Candidate	Votes	Pct
Charles Grassley* (R)	4,266	76.3%
David Osterberg (D)	1,286	23.0%
Susan Marcus (NtL)	23	0.4%
Margaret Trowe (SW)	15	0.3%
TOTAL	5,591
Turnout: 37%

1998 Senate class 3, Butler County
Candidate	Votes	Pct
Charles Grassley* (R)	4,007	80.1%
David Osterberg (D)	959	19.2%
Susan Marcus (NtL)	16	0.3%
Margaret Trowe (SW)	20	0.4%
TOTAL	5,003
Turnout: 43%

1998 Senate class 3, Calhoun County
Candidate	Votes	Pct
Charles Grassley* (R)	2,989	77.2%
David Osterberg (D)	845	21.8%
Susan Marcus (NtL)	27	0.7%
Margaret Trowe (SW)	9	0.2%
TOTAL	3,870
Turnout: 45%

1998 Senate class 3, Carroll County
Candidate	Votes	Pct
Charles Grassley* (R)	5,243	73.9%
David Osterberg (D)	1,785	25.2%
Susan Marcus (NtL)	50	0.7%
Margaret Trowe (SW)	16	0.2%
TOTAL	7,095
Turnout: 46%

1998 Senate class 3, Cass County
Candidate	Votes	Pct
Charles Grassley* (R)	3,926	78.9%
David Osterberg (D)	998	20.1%
Susan Marcus (NtL)	26	0.5%
Margaret Trowe (SW)	22	0.4%
TOTAL	4,973
Turnout: 44%

1998 Senate class 3, Cedar County
Candidate	Votes	Pct
Charles Grassley* (R)	4,254	69.5%
David Osterberg (D)	1,812	29.6%
Susan Marcus (NtL)	34	0.6%
Margaret Trowe (SW)	25	0.4%
TOTAL	6,125
Turnout: 46%

1998 Senate class 3, Cerro Gordo County
Candidate	Votes	Pct
Charles Grassley* (R)	11,065	67.9%
David Osterberg (D)	5,127	31.4%
Susan Marcus (NtL)	77	0.5%
Margaret Trowe (SW)	36	0.2%
TOTAL	16,306
Turnout: 46%

1998 Senate class 3, Cherokee County
Candidate	Votes	Pct
Charles Grassley* (R)	3,542	75.3%
David Osterberg (D)	1,113	23.7%
Susan Marcus (NtL)	32	0.7%
Margaret Trowe (SW)	13	0.3%
TOTAL	4,701
Turnout: 47%

1998 Senate class 3, Chickasaw County
Candidate	Votes	Pct
Charles Grassley* (R)	4,175	77.6%
David Osterberg (D)	1,159	21.5%
Susan Marcus (NtL)	29	0.5%
Margaret Trowe (SW)	13	0.2%
TOTAL	5,380
Turnout: 56%

1998 Senate class 3, Clarke County
Candidate	Votes	Pct
Charles Grassley* (R)	2,412	69.5%
David Osterberg (D)	1,004	28.9%
Susan Marcus (NtL)	45	1.3%
Margaret Trowe (SW)	9	0.3%
TOTAL	3,472
Turnout: 52%

1998 Senate class 3, Clay County
Candidate	Votes	Pct
Charles Grassley* (R)	4,306	73.9%
David Osterberg (D)	1,490	25.6%
Susan Marcus (NtL)	25	0.4%
Margaret Trowe (SW)	8	0.1%
TOTAL	5,829
Turnout: 45%

1998 Senate class 3, Clayton County
Candidate	Votes	Pct
Charles Grassley* (R)	4,724	73.6%
David Osterberg (D)	1,658	25.8%
Susan Marcus (NtL)	24	0.4%
Margaret Trowe (SW)	15	0.2%
TOTAL	6,421
Turnout: 46%

1998 Senate class 3, Clinton County
Candidate	Votes	Pct
Charles Grassley* (R)	9,379	62.6%
David Osterberg (D)	5,544	37.0%
Susan Marcus (NtL)	39	0.3%
Margaret Trowe (SW)	25	0.2%
TOTAL	14,988
Turnout: 40%

1998 Senate class 3, Crawford County
Candidate	Votes	Pct
Charles Grassley* (R)	3,723	76.1%
David Osterberg (D)	1,143	23.4%
Susan Marcus (NtL)	20	0.4%
Margaret Trowe (SW)	7	0.1%
TOTAL	4,893
Turnout: 40%

1998 Senate class 3, Dallas County
Candidate	Votes	Pct
Charles Grassley* (R)	9,482	69.3%
David Osterberg (D)	4,057	29.7%
Susan Marcus (NtL)	109	0.8%
Margaret Trowe (SW)	28	0.2%
TOTAL	13,681
Turnout: 49%

1998 Senate class 3, Davis County
Candidate	Votes	Pct
Charles Grassley* (R)	2,014	69.2%
David Osterberg (D)	855	29.4%
Susan Marcus (NtL)	35	1.2%
Margaret Trowe (SW)	5	0.2%
TOTAL	2,909
Turnout: 47%

1998 Senate class 3, Decatur County
Candidate	Votes	Pct
Charles Grassley* (R)	2,538	74.6%
David Osterberg (D)	827	24.3%
Susan Marcus (NtL)	29	0.9%
Margaret Trowe (SW)	7	0.2%
TOTAL	3,402
Turnout: 51%

1998 Senate class 3, Delaware County
Candidate	Votes	Pct
Charles Grassley* (R)	4,537	76.3%
David Osterberg (D)	1,377	23.2%
Susan Marcus (NtL)	21	0.4%
Margaret Trowe (SW)	9	0.2%
TOTAL	5,944
Turnout: 46%

1998 Senate class 3, Des Moines County
Candidate	Votes	Pct
Charles Grassley* (R)	6,642	52.1%
David Osterberg (D)	6,047	47.4%
Susan Marcus (NtL)	63	0.5%
Margaret Trowe (SW)	8	0.1%
TOTAL	12,760
Turnout: 40%

1998 Senate class 3, Dickinson County
Candidate	Votes	Pct
Charles Grassley* (R)	4,220	70.8%
David Osterberg (D)	1,675	28.1%
Susan Marcus (NtL)	39	0.7%
Margaret Trowe (SW)	25	0.4%
TOTAL	5,962
Turnout: 48%

1998 Senate class 3, Dubuque County
Candidate	Votes	Pct
Charles Grassley* (R)	17,166	63.0%
David Osterberg (D)	9,824	36.0%
Susan Marcus (NtL)	203	0.7%
Margaret Trowe (SW)	55	0.2%
TOTAL	27,253
Turnout: 41%

1998 Senate class 3, Emmet County
Candidate	Votes	Pct
Charles Grassley* (R)	2,290	66.6%
David Osterberg (D)	1,118	32.5%
Susan Marcus (NtL)	25	0.7%
Margaret Trowe (SW)	5	0.1%
TOTAL	3,438
Turnout: 41%

1998 Senate class 3, Fayette County
Candidate	Votes	Pct
Charles Grassley* (R)	5,520	73.8%
David Osterberg (D)	1,894	25.3%
Susan Marcus (NtL)	40	0.5%
Margaret Trowe (SW)	24	0.3%
TOTAL	7,479
Turnout: 46%

1998 Senate class 3, Floyd County
Candidate	Votes	Pct
Charles Grassley* (R)	4,452	75.0%
David Osterberg (D)	1,423	24.0%
Susan Marcus (NtL)	50	0.8%
Margaret Trowe (SW)	12	0.2%
TOTAL	5,938
Turnout: 47%

1998 Senate class 3, Franklin County
Candidate	Votes	Pct
Charles Grassley* (R)	3,129	80.7%
David Osterberg (D)	722	18.6%
Susan Marcus (NtL)	16	0.4%
Margaret Trowe (SW)	6	0.2%
TOTAL	3,877
Turnout: 47%

1998 Senate class 3, Fremont County
Candidate	Votes	Pct
Charles Grassley* (R)	1,957	74.6%
David Osterberg (D)	633	24.1%
Susan Marcus (NtL)	25	1.0%
Margaret Trowe (SW)	6	0.2%
TOTAL	2,622
Turnout: 44%

1998 Senate class 3, Greene County
Candidate	Votes	Pct
Charles Grassley* (R)	2,771	71.7%
David Osterberg (D)	1,053	27.2%
Susan Marcus (NtL)	35	0.9%
Margaret Trowe (SW)	6	0.2%
TOTAL	3,866
Turnout: 50%

1998 Senate class 3, Grundy County
Candidate	Votes	Pct
Charles Grassley* (R)	4,000	83.5%
David Osterberg (D)	779	16.3%
Susan Marcus (NtL)	8	0.2%
Margaret Trowe (SW)	4	0.1%
TOTAL	4,792
Turnout: 52%

1998 Senate class 3, Guthrie County
Candidate	Votes	Pct
Charles Grassley* (R)	3,113	72.2%
David Osterberg (D)	1,152	26.7%
Susan Marcus (NtL)	37	0.9%
Margaret Trowe (SW)	6	0.1%
TOTAL	4,309
Turnout: 50%

1998 Senate class 3, Hamilton County
Candidate	Votes	Pct
Charles Grassley* (R)	4,165	72.7%
David Osterberg (D)	1,516	26.5%
Susan Marcus (NtL)	41	0.7%
Margaret Trowe (SW)	6	0.1%
TOTAL	5,728
Turnout: 47%

1998 Senate class 3, Hancock County
Candidate	Votes	Pct
Charles Grassley* (R)	3,237	77.8%
David Osterberg (D)	896	21.5%
Susan Marcus (NtL)	13	0.3%
Margaret Trowe (SW)	16	0.4%
TOTAL	4,162
Turnout: 47%

1998 Senate class 3, Hardin County
Candidate	Votes	Pct
Charles Grassley* (R)	5,151	75.6%
David Osterberg (D)	1,621	23.8%
Susan Marcus (NtL)	25	0.4%
Margaret Trowe (SW)	17	0.2%
TOTAL	6,814
Turnout: 48%

1998 Senate class 3, Harrison County
Candidate	Votes	Pct
Charles Grassley* (R)	3,186	72.0%
David Osterberg (D)	1,161	26.2%
Susan Marcus (NtL)	59	1.3%
Margaret Trowe (SW)	18	0.4%
TOTAL	4,425
Turnout: 39%

1998 Senate class 3, Henry County
Candidate	Votes	Pct
Charles Grassley* (R)	4,991	70.5%
David Osterberg (D)	2,009	28.4%
Susan Marcus (NtL)	58	0.8%
Margaret Trowe (SW)	24	0.3%
TOTAL	7,084
Turnout: 47%

1998 Senate class 3, Howard County
Candidate	Votes	Pct
Charles Grassley* (R)	2,749	74.5%
David Osterberg (D)	901	24.4%
Susan Marcus (NtL)	37	1.0%
Margaret Trowe (SW)	4	0.1%
TOTAL	3,691
Turnout: 51%

1998 Senate class 3, Humboldt County
Candidate	Votes	Pct
Charles Grassley* (R)	3,057	80.1%
David Osterberg (D)	724	19.0%
Susan Marcus (NtL)	28	0.7%
Margaret Trowe (SW)	7	0.2%
TOTAL	3,816
Turnout: 49%

1998 Senate class 3, Ida County
Candidate	Votes	Pct
Charles Grassley* (R)	2,346	81.4%
David Osterberg (D)	512	17.8%
Susan Marcus (NtL)	12	0.4%
Margaret Trowe (SW)	12	0.4%
TOTAL	2,882
Turnout: 49%

1998 Senate class 3, Iowa County
Candidate	Votes	Pct
Charles Grassley* (R)	4,339	75.3%
David Osterberg (D)	1,363	23.6%
Susan Marcus (NtL)	53	0.9%
Margaret Trowe (SW)	8	0.1%
TOTAL	5,764
Turnout: 51%

1998 Senate class 3, Jackson County
Candidate	Votes	Pct
Charles Grassley* (R)	4,330	68.5%
David Osterberg (D)	1,946	30.8%
Susan Marcus (NtL)	38	0.6%
Margaret Trowe (SW)	11	0.2%
TOTAL	6,325
Turnout: 42%

1998 Senate class 3, Jasper County
Candidate	Votes	Pct
Charles Grassley* (R)	9,122	65.7%
David Osterberg (D)	4,625	33.3%
Susan Marcus (NtL)	110	0.8%
Margaret Trowe (SW)	34	0.2%
TOTAL	13,893
Turnout: 50%

1998 Senate class 3, Jefferson County
Candidate	Votes	Pct
Charles Grassley* (R)	3,763	59.0%
David Osterberg (D)	1,354	21.2%
Susan Marcus (NtL)	1,234	19.4%
Margaret Trowe (SW)	13	0.2%
TOTAL	6,373
Turnout: 52%

1998 Senate class 3, Johnson County
Candidate	Votes	Pct
Charles Grassley* (R)	17,901	53.3%
David Osterberg (D)	15,138	45.1%
Susan Marcus (NtL)	342	1.0%
Margaret Trowe (SW)	173	0.5%
TOTAL	33,569
Turnout: 39%

1998 Senate class 3, Jones County
Candidate	Votes	Pct
Charles Grassley* (R)	5,038	73.6%
David Osterberg (D)	1,739	25.4%
Susan Marcus (NtL)	56	0.8%
Margaret Trowe (SW)	15	0.2%
TOTAL	6,849
Turnout: 45%

1998 Senate class 3, Keokuk County
Candidate	Votes	Pct
Charles Grassley* (R)	2,824	75.0%
David Osterberg (D)	907	24.1%
Susan Marcus (NtL)	28	0.7%
Margaret Trowe (SW)	6	0.2%
TOTAL	3,765
Turnout: 44%

1998 Senate class 3, Kossuth County
Candidate	Votes	Pct
Charles Grassley* (R)	4,894	73.3%
David Osterberg (D)	1,713	25.7%
Susan Marcus (NtL)	50	0.7%
Margaret Trowe (SW)	14	0.2%
TOTAL	6,673
Turnout: 52%

1998 Senate class 3, Lee County
Candidate	Votes	Pct
Charles Grassley* (R)	5,836	50.1%
David Osterberg (D)	5,636	48.4%
Susan Marcus (NtL)	138	1.2%
Margaret Trowe (SW)	33	0.3%
TOTAL	11,654
Turnout: 40%

1998 Senate class 3, Linn County
Candidate	Votes	Pct
Charles Grassley* (R)	42,387	64.5%
David Osterberg (D)	22,759	34.6%
Susan Marcus (NtL)	433	0.7%
Margaret Trowe (SW)	104	0.2%
TOTAL	65,700
Turnout: 47%

1998 Senate class 3, Louisa County
Candidate	Votes	Pct
Charles Grassley* (R)	2,336	69.0%
David Osterberg (D)	1,010	29.8%
Susan Marcus (NtL)	25	0.7%
Margaret Trowe (SW)	15	0.4%
TOTAL	3,387
Turnout: 39%

1998 Senate class 3, Lucas County
Candidate	Votes	Pct
Charles Grassley* (R)	2,250	74.1%
David Osterberg (D)	769	25.3%
Susan Marcus (NtL)	17	0.6%
Margaret Trowe (SW)	2	0.1%
TOTAL	3,038
Turnout: 43%

1998 Senate class 3, Lyon County
Candidate	Votes	Pct
Charles Grassley* (R)	3,313	85.0%
David Osterberg (D)	554	14.2%
Susan Marcus (NtL)	18	0.5%
Margaret Trowe (SW)	11	0.3%
TOTAL	3,896
Turnout: 46%

1998 Senate class 3, Madison County
Candidate	Votes	Pct
Charles Grassley* (R)	3,794	70.6%
David Osterberg (D)	1,498	27.9%
Susan Marcus (NtL)	67	1.2%
Margaret Trowe (SW)	15	0.3%
TOTAL	5,374
Turnout: 54%

1998 Senate class 3, Mahaska County
Candidate	Votes	Pct
Charles Grassley* (R)	5,443	78.4%
David Osterberg (D)	1,449	20.9%
Susan Marcus (NtL)	36	0.5%
Margaret Trowe (SW)	15	0.2%
TOTAL	6,947
Turnout: 42%

1998 Senate class 3, Marion County
Candidate	Votes	Pct
Charles Grassley* (R)	7,107	71.9%
David Osterberg (D)	2,737	27.7%
Susan Marcus (NtL)	24	0.2%
Margaret Trowe (SW)	18	0.2%
TOTAL	9,888
Turnout: 42%

1998 Senate class 3, Marshall County
Candidate	Votes	Pct
Charles Grassley* (R)	9,679	69.1%
David Osterberg (D)	4,203	30.0%
Susan Marcus (NtL)	99	0.7%
Margaret Trowe (SW)	25	0.2%
TOTAL	14,010
Turnout: 48%

1998 Senate class 3, Mills County
Candidate	Votes	Pct
Charles Grassley* (R)	2,909	77.2%
David Osterberg (D)	805	21.4%
Susan Marcus (NtL)	39	1.0%
Margaret Trowe (SW)	11	0.3%
TOTAL	3,766
Turnout: 36%

1998 Senate class 3, Mitchell County
Candidate	Votes	Pct
Charles Grassley* (R)	3,198	74.8%
David Osterberg (D)	1,044	24.4%
Susan Marcus (NtL)	18	0.4%
Margaret Trowe (SW)	17	0.4%
TOTAL	4,277
Turnout: 53%

1998 Senate class 3, Monona County
Candidate	Votes	Pct
Charles Grassley* (R)	2,590	72.2%
David Osterberg (D)	947	26.4%
Susan Marcus (NtL)	34	0.9%
Margaret Trowe (SW)	18	0.5%
TOTAL	3,589
Turnout: 47%

1998 Senate class 3, Monroe County
Candidate	Votes	Pct
Charles Grassley* (R)	1,952	69.5%
David Osterberg (D)	820	29.2%
Susan Marcus (NtL)	24	0.9%
Margaret Trowe (SW)	14	0.5%
TOTAL	2,810
Turnout: 47%

1998 Senate class 3, Montgomery County
Candidate	Votes	Pct
Charles Grassley* (R)	3,251	80.8%
David Osterberg (D)	726	18.0%
Susan Marcus (NtL)	36	0.9%
Margaret Trowe (SW)	12	0.3%
TOTAL	4,026
Turnout: 45%

1998 Senate class 3, Muscatine County
Candidate	Votes	Pct
Charles Grassley* (R)	7,175	67.3%
David Osterberg (D)	3,365	31.6%
Susan Marcus (NtL)	76	0.7%
Margaret Trowe (SW)	39	0.4%
TOTAL	10,658
Turnout: 35%

1998 Senate class 3, O'Brien County
Candidate	Votes	Pct
Charles Grassley* (R)	3,998	82.4%
David Osterberg (D)	828	17.1%
Susan Marcus (NtL)	18	0.4%
Margaret Trowe (SW)	8	0.2%
TOTAL	4,853
Turnout: 43%

1998 Senate class 3, Osceola County
Candidate	Votes	Pct
Charles Grassley* (R)	1,810	82.5%
David Osterberg (D)	359	16.4%
Susan Marcus (NtL)	18	0.8%
Margaret Trowe (SW)	6	0.3%
TOTAL	2,193
Turnout: 42%

1998 Senate class 3, Page County
Candidate	Votes	Pct
Charles Grassley* (R)	4,417	81.9%
David Osterberg (D)	917	17.0%
Susan Marcus (NtL)	39	0.7%
Margaret Trowe (SW)	19	0.4%
TOTAL	5,393
Turnout: 42%

1998 Senate class 3, Palo Alto County
Candidate	Votes	Pct
Charles Grassley* (R)	2,419	67.6%
David Osterberg (D)	1,141	31.9%
Susan Marcus (NtL)	11	0.3%
Margaret Trowe (SW)	5	0.1%
TOTAL	3,576
Turnout: 46%

1998 Senate class 3, Plymouth County
Candidate	Votes	Pct
Charles Grassley* (R)	5,461	81.2%
David Osterberg (D)	1,245	18.5%
Susan Marcus (NtL)	10	0.1%
Margaret Trowe (SW)	10	0.1%
TOTAL	6,726
Turnout: 38%

1998 Senate class 3, Pocahontas County
Candidate	Votes	Pct
Charles Grassley* (R)	2,225	76.0%
David Osterberg (D)	672	23.0%
Susan Marcus (NtL)	20	0.7%
Margaret Trowe (SW)	5	0.2%
TOTAL	2,928
Turnout: 45%

1998 Senate class 3, Polk County
Candidate	Votes	Pct
Charles Grassley* (R)	81,972	64.7%
David Osterberg (D)	43,498	34.3%
Susan Marcus (NtL)	810	0.6%
Margaret Trowe (SW)	445	0.4%
TOTAL	126,780
Turnout: 47%

1998 Senate class 3, Pottawattamie County
Candidate	Votes	Pct
Charles Grassley* (R)	14,601	68.6%
David Osterberg (D)	6,355	29.8%
Susan Marcus (NtL)	212	1.0%
Margaret Trowe (SW)	106	0.5%
TOTAL	21,291
Turnout: 33%

1998 Senate class 3, Poweshiek County
Candidate	Votes	Pct
Charles Grassley* (R)	4,324	67.6%
David Osterberg (D)	1,983	31.0%
Susan Marcus (NtL)	58	0.9%
Margaret Trowe (SW)	34	0.5%
TOTAL	6,401
Turnout: 44%

1998 Senate class 3, Ringgold County
Candidate	Votes	Pct
Charles Grassley* (R)	1,789	77.1%
David Osterberg (D)	507	21.9%
Susan Marcus (NtL)	13	0.6%
Margaret Trowe (SW)	10	0.4%
TOTAL	2,320
Turnout: 56%

1998 Senate class 3, Sac County
Candidate	Votes	Pct
Charles Grassley* (R)	3,454	79.5%
David Osterberg (D)	859	19.8%
Susan Marcus (NtL)	30	0.7%
Margaret Trowe (SW)	4	0.1%
TOTAL	4,347
Turnout: 49%

1998 Senate class 3, Scott County
Candidate	Votes	Pct
Charles Grassley* (R)	30,855	66.2%
David Osterberg (D)	15,244	32.7%
Susan Marcus (NtL)	356	0.8%
Margaret Trowe (SW)	103	0.2%
TOTAL	46,574
Turnout: 40%

1998 Senate class 3, Shelby County
Candidate	Votes	Pct
Charles Grassley* (R)	3,225	76.1%
David Osterberg (D)	994	23.4%
Susan Marcus (NtL)	13	0.3%
Margaret Trowe (SW)	7	0.2%
TOTAL	4,239
Turnout: 44%

1998 Senate class 3, Sioux County
Candidate	Votes	Pct
Charles Grassley* (R)	9,017	90.9%
David Osterberg (D)	880	8.9%
Susan Marcus (NtL)	13	0.1%
Margaret Trowe (SW)	12	0.1%
TOTAL	9,923
Turnout: 44%

1998 Senate class 3, Story County
Candidate	Votes	Pct
Charles Grassley* (R)	16,003	64.4%
David Osterberg (D)	8,532	34.4%
Susan Marcus (NtL)	181	0.7%
Margaret Trowe (SW)	100	0.4%
TOTAL	24,831
Turnout: 39%

1998 Senate class 3, Tama County
Candidate	Votes	Pct
Charles Grassley* (R)	4,697	72.9%
David Osterberg (D)	1,689	26.2%
Susan Marcus (NtL)	43	0.7%
Margaret Trowe (SW)	14	0.2%
TOTAL	6,444
Turnout: 49%

1998 Senate class 3, Taylor County
Candidate	Votes	Pct
Charles Grassley* (R)	1,847	75.4%
David Osterberg (D)	570	23.3%
Susan Marcus (NtL)	23	0.9%
Margaret Trowe (SW)	9	0.4%
TOTAL	2,450
Turnout: 46%

1998 Senate class 3, Union County
Candidate	Votes	Pct
Charles Grassley* (R)	3,204	73.2%
David Osterberg (D)	1,144	26.1%
Susan Marcus (NtL)	20	0.5%
Margaret Trowe (SW)	12	0.3%
TOTAL	4,380
Turnout: 46%

1998 Senate class 3, Van Buren County
Candidate	Votes	Pct
Charles Grassley* (R)	2,036	71.8%
David Osterberg (D)	762	26.9%
Susan Marcus (NtL)	33	1.2%
Margaret Trowe (SW)	6	0.2%
TOTAL	2,837
Turnout: 49%

1998 Senate class 3, Wapello County
Candidate	Votes	Pct
Charles Grassley* (R)	7,046	60.1%
David Osterberg (D)	4,492	38.3%
Susan Marcus (NtL)	142	1.2%
Margaret Trowe (SW)	34	0.3%
TOTAL	11,719
Turnout: 43%

1998 Senate class 3, Warren County
Candidate	Votes	Pct
Charles Grassley* (R)	9,414	66.7%
David Osterberg (D)	4,577	32.4%
Susan Marcus (NtL)	82	0.6%
Margaret Trowe (SW)	42	0.3%
TOTAL	14,118
Turnout: 49%

1998 Senate class 3, Washington County
Candidate	Votes	Pct
Charles Grassley* (R)	4,946	72.9%
David Osterberg (D)	1,754	25.9%
Susan Marcus (NtL)	71	1.0%
Margaret Trowe (SW)	13	0.2%
TOTAL	6,785
Turnout: 45%

1998 Senate class 3, Wayne County
Candidate	Votes	Pct
Charles Grassley* (R)	1,697	70.8%
David Osterberg (D)	697	29.1%
Margaret Trowe (SW)	2	0.1%
TOTAL	2,396
Turnout: 46%

1998 Senate class 3, Webster County
Candidate	Votes	Pct
Charles Grassley* (R)	8,638	68.0%
David Osterberg (D)	3,945	31.0%
Susan Marcus (NtL)	101	0.8%
Margaret Trowe (SW)	24	0.2%
TOTAL	12,711
Turnout: 42%

1998 Senate class 3, Winnebago County
Candidate	Votes	Pct
Charles Grassley* (R)	3,103	74.9%
David Osterberg (D)	1,001	24.2%
Susan Marcus (NtL)	24	0.6%
Margaret Trowe (SW)	16	0.4%
TOTAL	4,144
Turnout: 46%

1998 Senate class 3, Winneshiek County
Candidate	Votes	Pct
Charles Grassley* (R)	4,967	73.5%
David Osterberg (D)	1,730	25.6%
Susan Marcus (NtL)	35	0.5%
Margaret Trowe (SW)	23	0.3%
TOTAL	6,755
Turnout: 41%

1998 Senate class 3, Woodbury County
Candidate	Votes	Pct
Charles Grassley* (R)	18,148	68.5%
David Osterberg (D)	8,079	30.5%
Susan Marcus (NtL)	153	0.6%
Margaret Trowe (SW)	111	0.4%
TOTAL	26,499
Turnout: 36%

1998 Senate class 3, Worth County
Candidate	Votes	Pct
Charles Grassley* (R)	2,341	72.6%
David Osterberg (D)	841	26.1%
Susan Marcus (NtL)	37	1.1%
Margaret Trowe (SW)	4	0.1%
TOTAL	3,224
Turnout: 54%

1998 Senate class 3, Wright County
Candidate	Votes	Pct
Charles Grassley* (R)	3,316	73.5%
David Osterberg (D)	1,190	26.4%
Susan Marcus (NtL)	6	0.1%
Margaret Trowe (SW)	1	0.0%
TOTAL	4,514
Turnout: 42%

Campaign finance data for this election**:

Charles Grassley*
Total Disbursements:	$3,743,873
Total Receipts:	$4,531,099
Cash on Hand:	$1,610,727
Candidate Contributions:	$0
Candidate Loans:	$0
Individual Contributions:	$1,819,615
Party Contributions:	$17,823
Other Committee Contributions:	$1,556,765
Other Committee Transfers:	$730,166
Indep. Expenditures Supporting:	$10,149
Indep. Expenditures Opposing:	$0
Net Independent Expenditures:	$10,149
Net Spending:	$3,754,022

David Osterberg
Total Disbursements:	$165,429
Total Receipts:	$165,655
Cash on Hand:	$225
Candidate Contributions:	$0
Candidate Loans:	$1,000
Individual Contributions:	$136,274
Party Contributions:	$2,221
Other Committee Contributions:	$25,200
Other Committee Transfers:	$0
Indep. Expenditures Supporting:	$0
Indep. Expenditures Opposing:	$0
Net Independent Expenditures:	$0
Net Spending:	$165,429

**Financial data shown here takes into account all elections for this office during this cycle, including primary, special and runoff elections, if any.
Source: https://www.fec.gov/data/elections/senate/IA/1998