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Miami County, OH


Metropolitan Statistical Area: Dayton-Kettering, OH
Designated Market Area: Dayton, OH-IN
USDA County Type (2025): Manufacturing
American Communities Project County Type (2023): Rural Middle America

Places in Miami County, OH     [Sort places by name]

 

Tracts in Miami County, OH

   



Click here to view demographic data for Miami County, OH

2024 population: 111,950   ( 3,176 from 2020)
Land area: 406.5 square miles
Population density: 275.4 persons per square mile

2024 Census data
White:100,714 89.96% 1.3%
Black:3,3352.98% 24.8%
Indian:1990.18% 10.8%
Asian:2,5922.32% 32.3%
2+ races:2,6042.33% 15.6%
Hispanic:2,5062.24% 14.0%
Total non-White:11,23610.04% 20.8%

2020-2024 ComponentsNumberRate
Births:4,750 10.9
Deaths:5,67313.0
Net Migration: 3,3497.7
Net Immigration: 7121.6
Change in White population:1,245 1.1
Change in Non-White pop.:1,931 1.8



Historical Presidential Election Results for Miami County, OH

Recent Trends
VotesΔ MarginSwing %
2024 vs. 2020 R +1,306 R +1,000 R + 0.5%
D +306
2024 vs. 2016 R +5,598 R +2,749 D + 2.2%
D +2,849
2020 vs. 2016 R +4,292 R +1,749 D + 2.7%
D +2,543
2024 vs. 2012 R +8,071 R +8,485 R + 9.8%
D -414
2016 vs. 2008 R +3,662 R +8,914 R + 18.7%
D -5,252
How to interpret this table


Click on the Year to view county-level data for that election.

YearTurnout WinnerRunner-Up OtherTotal Votes Diff
(St) 		Diff
(US) 		PSV
2024 69% Donald Trump (R) 42,677 71.8% Kamala Harris (D) 15,969 26.9% 792 [+] 1.3% 59,438 17 22 1.02%
2020 69% Donald Trump* (R) 41,371 71.2% Joe Biden (D) 15,663 27.0% 1,043 [+] 1.8% 58,077 18 24 0.98%
2016 65% Donald Trump (R) 37,079 69.8% Hillary Clinton (D) 13,120 24.7% 2,895 [+] 5.5% 53,094 19 24 0.96%
2012 66% Mitt Romney (R) 34,606 66.5% Barack Obama* (D) 16,383 31.5% 1,025 [+] 2.0% 52,014 19 19 0.93%
2008 69% John McCain (R) 33,417 63.2% Barack Obama (D) 18,372 34.7% 1,126 [+] 2.1% 52,915 16 18 0.92%
2004 69% George W. Bush* (R) 33,992 65.7% John Kerry (D) 17,606 34.0% 162 [+] 0.3% 51,760 15 15 0.92%
2000 58% George W. Bush (R) 26,037 60.8% Albert Gore, Jr. (D) 15,584 36.4% 1,220 [+] 2.8% 42,841 11 13 0.91%
1996 56% Robert Dole (R) 19,509 48.8% Bill Clinton* (D) 15,540 38.8% 4,956 [+] 12.4% 40,005 8 8 0.88%
1992 62% George Bush* (R) 19,741 45.9% Bill Clinton (D) 12,547 29.2% 10,718 [+] 24.9% 43,006 8 9 0.87%
1988 54% George Bush (R) 24,915 68.4% Michael Dukakis (D) 11,138 30.6% 381 [+] 1.0% 36,434 13 15 0.83%
1984 56% Ronald Reagan* (R) 26,300 72.4% Walter Mondale (D) 9,695 26.7% 320 0.9% 36,315 14 14 0.80%
1980 57% Ronald Reagan (R) 19,928 55.7% Jimmy Carter* (D) 12,893 36.0% 2,987 [+] 8.3% 35,808 4 5 0.84%
1976 56% Gerald Ford* (R) 18,686 57.6% Jimmy Carter (D) 13,074 40.3% 653 [+] 2.0% 32,413 9 10 0.79%
1972 56% Richard Nixon* (R) 21,226 68.4% George McGovern (D) 9,121 29.4% 665 [+] 2.1% 31,012 9 8 0.76%
1968 69% Richard Nixon (R) 16,997 50.6% Hubert Humphrey (D) 13,228 39.4% 3,352 [+] 10.0% 33,577 5 7 0.85%
1964 71% Lyndon Johnson* (D) 19,379 59.9% Barry Goldwater (R) 12,985 40.1% 0 0.0% 32,364 3 2 0.82%
1960 79% Richard Nixon (R) 22,151 65.3% John Kennedy (D) 11,770 34.7% 0 0.0% 33,921 12 16 0.82%
1956 67% Dwight Eisenhower* (R) 20,135 68.6% Adlai Stevenson (D) 9,229 31.4% 0 0.0% 29,364 7 11 0.79%
1952 73% Dwight Eisenhower (R) 19,525 65.1% Adlai Stevenson (D) 10,462 34.9% 0 0.0% 29,987 8 10 0.81%
1948 60% Thomas Dewey (R) 13,100 56.3% Harry Truman* (D) 10,066 43.3% 89 [+] 0.4% 23,255 7 11 0.79%
1944 69% Thomas Dewey (R) 14,751 58.5% Franklin Roosevelt* (D) 10,476 41.5% 0 0.0% 25,227 8 13 0.80%
1940 78% Wendell Willkie (R) 14,725 55.5% Franklin Roosevelt* (D) 11,799 44.5% 0 0.0% 26,524 8 11 0.80%
1936 80% Franklin Roosevelt* (D) 12,754 50.4% Alf Landon (R) 11,343 44.9% 1,189 [+] 4.7% 25,286 7 8 0.84%
1932 75% Herbert Hoover* (R) 12,157 51.9% Franklin Roosevelt (D) 10,677 45.6% 568 [+] 2.4% 23,402 5 12 0.90%
1928 72% Herbert Hoover (R) 16,063 72.8% Al Smith (D) 5,867 26.6% 136 [+] 0.6% 22,066 8 15 0.88%
1924 63% Calvin Coolidge (R) 11,851 62.7% John Davis (D) 5,296 28.0% 1,754 [+] 9.3% 18,901 4 9 0.94%
1920 75% Warren Harding (R) 13,122 60.3% James Cox (D) 8,076 37.1% 572 [+] 2.6% 21,770 2 0 1.08%
1916 42% Charles Evans Hughes (R) 5,772 48.6% Woodrow Wilson* (D) 5,582 47.0% 519 [+] 4.4% 11,873 4 3 1.02%
1912 41% Woodrow Wilson (D) 4,310 38.7% William Taft* (R) 3,615 32.5% 3,200 [+] 28.8% 11,125 6 9 1.07%
1908 48% William Taft (R) 6,558 53.7% William J. Bryan (D) 5,369 44.0% 288 [+] 2.4% 12,215 3 2 1.09%
1904 44% Theodore Roosevelt (R) 6,793 62.4% Alton Parker (D) 3,646 33.5% 440 [+] 4.0% 10,879 3 6 1.08%
1900 47% William McKinley* (R) 6,197 53.9% William J. Bryan (D) 5,127 44.6% 181 [+] 1.6% 11,505 2 2 1.11%
* incumbent         PSV: percent of state vote

Historical Statewide Election Results for Miami County, OH

Click on the Year to view county-level data for that election.

YearTypeTurnout WinnerRunner-Up OtherTotal VotesDiff PSV
2024 S1 69% Bernie Moreno (R) 39,225 66.7% Sherrod Brown* (D) 17,525 29.8% 2,039 [+] 3.5% 58,789 17 1.03%
2022 S3 49% J.D. Vance (R) 30,114 71.5% Tim Ryan (D) 11,993 28.5% 24 [+] 0.1% 42,131 18 1.02%
2022 G 49% Mike DeWine* (R) 33,709 79.8% Nan Whaley (D) 8,452 20.0% 79 [+] 0.2% 42,240 17 1.02%
2018 S1 43% Jim Renacci (R) 23,219 65.8% Sherrod Brown* (D) 12,064 34.2% 0 0.0% 35,283 19 0.80%
2018 G 43% Mike DeWine (R) 25,106 70.5% Richard Cordray (D) 9,115 25.6% 1,371 [+] 3.9% 35,592 20 0.80%
2016 S3 64% Rob Portman* (R) 40,745 78.2% Ted Strickland (D) 9,202 17.7% 2,172 [+] 4.2% 52,119 20 0.97%
2014 G 39% John Kasich* (R) 24,735 79.6% Edward FitzGerald (D) 5,693 18.3% 646 [+] 2.1% 31,074 16 1.02%
2012 S1 65% Josh Mandel (R) 32,866 64.5% Sherrod Brown* (D) 15,968 31.3% 2,156 [+] 4.2% 50,990 20 0.94%
2010 S3 48% Rob Portman (R) 27,145 73.5% Lee Fisher (D) 8,496 23.0% 1,301 [+] 3.5% 36,942 17 0.97%
2010 G 48% John Kasich (R) 23,543 63.4% Ted Strickland* (D) 11,729 31.6% 1,865 [+] 5.0% 37,137 14 0.96%
2006 S1 49% Mike DeWine* (R) 21,299 57.5% Sherrod Brown (D) 15,734 42.5% 6 [+] 0.0% 37,039 14 0.92%
2006 G 49% Kenneth Blackwell (R) 18,395 49.6% Ted Strickland (D) 17,263 46.6% 1,396 [+] 3.8% 37,054 13 0.92%
2004 S3 67% George Voinovich* (R) 37,659 75.1% Eric Fingerhut (D) 12,510 24.9% 2 [+] 0.0% 50,171 11 0.92%
2002 G 40% Bob Taft III* (R) 20,743 70.1% Tim Hagan (D) 7,297 24.7% 1,542 [+] 5.2% 29,582 12 0.92%
2000 S1 57% Mike DeWine* (R) 30,394 72.7% Ted Celeste (D) 9,494 22.7% 1,897 [+] 4.5% 41,785 13 0.94%
1998 S3 43% George Voinovich (R) 19,673 63.0% Mary Boyle (D) 11,549 37.0% 0 0.0% 31,222 7 0.92%
1998 G 42% Bob Taft III (R) 17,127 56.3% Lee Fisher (D) 11,111 36.5% 2,175 [+] 7.2% 30,413 6 0.91%
1994 S1 42% Mike DeWine (R) 18,046 60.8% Joel Hyatt (D) 9,476 31.9% 2,175 [+] 7.3% 29,697 7 0.86%
1994 G 41% George Voinovich* (R) 21,857 76.3% Robert Burch (D) 5,775 20.2% 1,004 [+] 3.5% 28,636 5 0.86%
1992 S3 61% Mike DeWine (R) 20,694 48.7% John Glenn* (D) 18,267 43.0% 3,500 [+] 8.2% 42,461 7 0.88%
1990 G 44% George Voinovich (R) 19,054 64.1% Anthony Celebrezze (D) 10,677 35.9% 0 0.0% 29,731 8 0.85%
1988 S1 54% Howard Metzenbaum* (D) 18,698 51.5% George Voinovich (R) 17,620 48.5% 0 0.0% 36,318 5 0.83%
1986 S3 40% Thomas Kindness (R) 14,166 53.1% John Glenn* (D) 12,529 46.9% 0 0.0% 26,695 16 0.86%
1986 G 39% Richard Celeste* (D) 14,515 56.5% James Rhodes (R) 11,144 43.4% 15 [+] 0.1% 25,674 4 0.84%
1982 S1 43% Howard Metzenbaum* (D) 14,846 53.4% Paul Pfeifer (R) 12,509 45.0% 468 [+] 1.7% 27,823 4 0.82%
1982 G 42% Richard Celeste (D) 13,700 50.5% Clarence Brown, Jr. (R) 12,879 47.5% 560 [+] 2.1% 27,139 9 0.81%
1980 S3 56% John Glenn* (D) 24,630 69.9% James Betts (R) 10,087 28.6% 511 [+] 1.5% 35,228 0 0.87%
1978 G 40% James Rhodes* (R) 12,395 52.4% Richard Celeste (D) 10,607 44.8% 670 [+] 2.8% 23,672 3 0.83%
1976 S1 56% Robert Taft, Jr.* (R) 17,869 55.1% Howard Metzenbaum (D) 13,712 42.3% 824 [+] 2.5% 32,405 9 0.83%
1974 S3 45% John Glenn (D) 16,476 64.8% Ralph Perk (R) 8,124 32.0% 810 [+] 3.2% 25,410 1 0.85%
1974 G 45% James Rhodes (R) 13,449 52.4% John Gilligan* (D) 10,974 42.8% 1,243 [+] 4.8% 25,666 4 0.84%
1970 S1 50% Robert Taft, Jr. (R) 14,159 55.5% Howard Metzenbaum (D) 10,735 42.1% 597 [+] 2.3% 25,491 6 0.81%
1970 G 50% John Gilligan (D) 12,510 49.0% Roger Cloud (R) 12,375 48.5% 624 [+] 2.4% 25,509 5 0.80%
1968 S3 67% William Saxbe (R) 18,155 55.5% John Gilligan (D) 14,539 44.5% 0 0.0% 32,694 4 0.87%
1966 G 47% James Rhodes* (R) 14,723 65.6% Frazier Reams, Jr. (D) 7,724 34.4% 0 0.0% 22,447 3 0.78%
1964 S1 69% Robert Taft, Jr. (R) 17,766 56.0% Stephen Young* (D) 13,950 44.0% 0 0.0% 31,716 6 0.83%
1962 S3 52% Frank Lausche* (D) 12,707 54.5% John Briley (R) 10,588 45.5% 0 0.0% 23,295 7 0.78%
1962 G 53% James Rhodes (R) 16,224 68.4% Michael DiSalle* (D) 7,478 31.6% 0 0.0% 23,702 10 0.76%
*: incumbent               +: ran on additional party lines               Type: G: Governor; S1,S2,S3: Senate Class 1, 2 or 3
italics: special election           RO: runoff election           PSV: percent of state vote


Historical U.S. House Election Results for Miami County, OH

Click on the District to view county-level data for that election (where available).

DateDistrictWinnerRunner-Up OtherTotal Votes
2024-11-05 OH08Warren Davidson* (R) 8,039 79.6% Vanessa Enoch (D) 2,066 20.4% 0 0.0% 10,105
2024-11-05 OH15Mike Carey* (R) 34,659 73.4% Adam Miller (D) 12,555 26.6% 0 0.0% 47,214
County Total for 2024-11-05:   57,319
2022-11-08 OH08Warren Davidson* (R) 6,183 79.7% Vanessa Enoch (D) 1,576 20.3% 0 0.0% 7,759
2022-11-08 OH15Mike Carey* (R) 25,425 74.7% Gary Josephson (D) 8,629 25.3% 0 0.0% 34,054
County Total for 2022-11-08:   41,813
2020-11-03 OH08Warren Davidson* (R) 42,298 75.2% Vanessa Enoch (D) 13,918 24.8% 11 0.0% 56,227
County Total for 2020-11-03:   56,227
2018-11-06 OH08Warren Davidson* (R) 30,197 72.8% Vanessa Enoch (D) 11,279 27.2% 0 0.0% 41,476
County Total for 2018-11-06:   41,476
2016-11-08 OH08Warren Davidson* (R) 38,041 75.7% Steven Fought (D) 10,375 20.6% 1,859 3.7% 50,275
County Total for 2016-11-08:   50,275
2016-06-07 sp OH08Warren Davidson (R) 4,896 84.8% Corey Foister (D) 745 12.9% 135 2.3% 5,776
County Total for 2016-06-07:   5,776
2014-11-04 OH08John Boehner* (R) 22,336 72.1% Tom Poetter (D) 6,937 22.4% 1,718 5.5% 30,991
County Total for 2014-11-04:   30,991
2012-11-06 OH08John Boehner* (R) 39,751 100.0% 0 0.0% 39,751
County Total for 2012-11-06:   39,751
2010-11-02 OH08John Boehner* (R) 25,864 69.8% Justin Coussoule (D) 9,544 25.7% 1,668 4.5% 37,076
County Total for 2010-11-02:   37,076
2008-11-04 OH08John Boehner* (R) 35,927 72.3% Nicholas Von Stein (D) 13,782 27.7% 0 0.0% 49,709
County Total for 2008-11-04:   49,709
2006-11-07 OH08John Boehner* (R) 24,762 67.4% Mort Meier (D) 11,967 32.6% 0 0.0% 36,729
County Total for 2006-11-07:   36,729
2004-11-02 OH08John Boehner* (R) 35,168 70.4% Jeff Hardenbrook (D) 14,803 29.6% 0 0.0% 49,971
County Total for 2004-11-02:   49,971
2002-11-05 OH08John Boehner* (R) 21,133 71.3% Jeff Hardenbrook (D) 8,486 28.7% 0 0.0% 29,619
County Total for 2002-11-05:   29,619
2000-11-07 OH08John Boehner* (R) 29,904 71.9% John Parks (D) 10,309 24.8% 1,351 3.3% 41,564
County Total for 2000-11-07:   41,564
1996-11-05 OH08John Boehner* (R) 27,552 70.6% Jeffrey Kitchen (D) 9,884 25.3% 1,569 4.0% 39,005
County Total for 1996-11-05:   39,005
1994-11-08 OH08John Boehner* (R) 25,088 100.0% Roger Campbell (I) 4 0.0% 0 0.0% 25,092
County Total for 1994-11-08:   25,092
*: incumbent           sp: special election           RO: runoff election

Voter Registration Data for Miami County, OH

Party registration is not used in this state, however as of 2022 registrations in Miami County, OH were estimated to be 45% Republican and 16% Democrat.

YearTotalRepublicanDemocratOtherR/D EdgeR/D Edge %VAPOP %
2024 78,732 0 0.0% 0 0.0% 78,732 100.0% n/a n/a 92%
2022 76,283 0 0.0% 0 0.0% 76,283 100.0% n/a n/a 89%
2020 75,470 0 0.0% 0 0.0% 75,470 100.0% n/a n/a 88%
2018 74,338 0 0.0% 0 0.0% 74,338 100.0% n/a n/a 88%
2016 72,257 0 0.0% 0 0.0% 72,257 100.0% n/a n/a 88%
2014 70,855 0 0.0% 0 0.0% 70,855 100.0% n/a n/a 88%
2012 70,675 0 0.0% 0 0.0% 70,675 100.0% n/a n/a 89%
2010 71,894 0 0.0% 0 0.0% 71,894 100.0% n/a n/a 92%
2008 71,373 0 0.0% 0 0.0% 71,373 100.0% n/a n/a 93%
2006 68,732 0 0.0% 0 0.0% 68,732 100.0% n/a n/a 90%
2004 72,169 0 0.0% 0 0.0% 72,169 100.0% n/a n/a 96%
2002 66,285 0 0.0% 0 0.0% 66,285 100.0% n/a n/a 89%
2000 66,765 0 0.0% 0 0.0% 66,765 100.0% n/a n/a 91%
1998 57,726 0 0.0% 0 0.0% 57,726 100.0% n/a n/a 80%
VAPOP% is the estimated percentage of voting age population that is registered.
Registration data may include "inactive" voters.   Data for each year pertains to the November elections.