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Jefferson County, CO


Metropolitan Statistical Area: Denver-Aurora-Lakewood, CO
Designated Market Area: Denver, CO-NE-WY
American Communities Project County Type (2023): Exurbs

Places in Jefferson County, CO     [Sort places by name]

 

Tracts in Jefferson County, CO

   



Click here to view demographic data for Jefferson County, CO

2022 population: 576,143   ( 41,600 from 2010 , 6,759 from 2020)
Land area: 764.4 square miles
Population density: 753.7 persons per square mile

2022 Census data
White:442,786 76.85% 3.7%
Black:7,6721.33% 53.4%
Indian:2,8880.50% 9.5%
Asian:18,6333.23% 32.4%
2+ races:12,0062.08% 41.0%
Hispanic:92,15816.00% 20.6%
Total non-White:133,35723.15% 24.2%

2020-2022 ComponentsNumberRate
Births:12,534 10.8
Deaths:12,09510.4
Net Migration: -8,170-7.0
Net Immigration: 7860.7
Change in White population:15,626 2.9
Change in Non-White pop.:25,974 4.9



Historical Presidential Election Results for Jefferson County, CO

Recent Trends
VotesΔ MarginSwing %
2020 vs. 2016 R +10,240 D +47,380 D + 11.5%
D +57,620
2020 vs. 2012 R +4,220 D +54,880 D + 14.1%
D +59,100
2020 vs. 2008 R +16,789 D +43,449 D + 9.9%
D +60,238
2016 vs. 2008 R +6,549 R +3,931 R + 1.6%
D +2,618
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
2020 81% Joe Biden (D) 218,396 57.9% Donald Trump* (R) 148,417 39.3% 10,545 [+] 2.8% 377,358 -3 -7 11.59%
2016 74% Hillary Clinton (D) 160,776 48.9% Donald Trump (R) 138,177 42.0% 29,930 [+] 9.1% 328,883 -1 -4 11.83%
2012 73% Barack Obama* (D) 159,296 51.2% Mitt Romney (R) 144,197 46.4% 7,559 [+] 2.4% 311,052 0 -1 12.09%
2008 72% Barack Obama (D) 158,158 53.6% John McCain (R) 131,628 44.6% 5,282 [+] 1.8% 295,068 0 -1 12.29%
2004 67% George W. Bush* (R) 140,644 51.8% John Kerry (D) 126,558 46.6% 4,366 [+] 1.6% 271,568 0 1 12.75%
2000 60% George W. Bush (R) 120,138 51.0% Albert Gore, Jr. (D) 100,970 42.9% 14,383 [+] 6.1% 235,491 0 3 13.52%
1996 57% Robert Dole (R) 101,517 48.4% Bill Clinton* (D) 89,494 42.7% 18,712 [+] 8.9% 209,723 3 8 13.88%
1992 66% George Bush* (R) 82,705 37.1% Bill Clinton (D) 80,834 36.2% 59,664 [+] 26.7% 223,203 1 0 14.22%
1988 63% George Bush (R) 110,820 56.4% Michael Dukakis (D) 81,824 41.6% 3,867 [+] 2.0% 196,511 3 3 14.32%
1984 63% Ronald Reagan* (R) 124,496 68.9% Walter Mondale (D) 53,700 29.7% 2,432 1.3% 180,628 5 10 13.94%
1980 63% Ronald Reagan (R) 97,008 59.7% Jimmy Carter* (D) 41,525 25.5% 24,078 [+] 14.8% 162,611 5 9 13.73%
1976 69% Gerald Ford* (R) 87,080 60.4% Jimmy Carter (D) 52,782 36.6% 4,211 [+] 2.9% 144,073 6 12 13.32%
1972 67% Richard Nixon* (R) 80,082 69.9% George McGovern (D) 31,555 27.5% 2,960 [+] 2.6% 114,597 7 9 12.01%
1968 73% Richard Nixon (R) 50,847 56.8% Hubert Humphrey (D) 31,392 35.1% 7,263 [+] 8.1% 89,502 6 13 11.03%
1964 79% Lyndon Johnson* (D) 43,162 56.2% Barry Goldwater (R) 33,398 43.5% 252 0.3% 76,812 5 5 9.89%
1960 78% Richard Nixon (R) 34,105 59.6% John Kennedy (D) 22,962 40.1% 137 0.2% 57,204 5 10 7.77%
1956 67% Dwight Eisenhower* (R) 25,398 63.7% Adlai Stevenson (D) 14,270 35.8% 197 0.5% 39,865 4 6 6.07%
1952 75% Dwight Eisenhower (R) 19,971 63.1% Adlai Stevenson (D) 11,509 36.3% 194 0.6% 31,674 3 8 5.03%
1948 63% Thomas Dewey (R) 9,903 51.3% Harry Truman* (D) 9,145 47.4% 260 [+] 1.3% 19,308 5 6 3.75%
1944 70% Thomas Dewey (R) 9,815 57.2% Franklin Roosevelt* (D) 7,277 42.4% 68 0.4% 17,160 4 11 3.40%
1940 90% Wendell Willkie (R) 8,780 52.8% Franklin Roosevelt* (D) 7,745 46.6% 100 0.6% 16,625 2 8 3.03%
1936 82% Franklin Roosevelt* (D) 7,283 56.8% Alf Landon (R) 5,271 41.1% 271 [+] 2.1% 12,825 4 5 2.62%
1932 89% Franklin Roosevelt (D) 6,023 50.0% Herbert Hoover* (R) 5,522 45.8% 503 [+] 4.2% 12,048 4 6 2.63%
1928 84% Herbert Hoover (R) 6,754 69.1% Al Smith (D) 2,880 29.5% 141 [+] 1.4% 9,775 4 11 2.49%
1924 77% Calvin Coolidge (R) 4,869 63.7% Robert LaFollette (Prog) 1,485 19.4% 1,291 [+] 16.9% 7,645 7 10 2.23%
1920 71% Warren Harding (R) 3,593 61.5% James Cox (D) 1,941 33.2% 306 [+] 5.2% 5,840 2 1 2.00%
1916 65% Woodrow Wilson* (D) 3,368 60.4% Charles Evans Hughes (R) 2,040 36.6% 166 [+] 3.0% 5,574 2 -10 1.89%
1912 63% Woodrow Wilson (D) 2,309 43.1% Theodore Roosevelt (Prog) 1,650 30.8% 1,398 [+] 26.1% 5,357 -3 -4 2.01%
1908 68% William Taft (R) 2,623 48.6% William J. Bryan (D) 2,583 47.8% 193 [+] 3.6% 5,399 2 -3 2.05%
1904 71% Theodore Roosevelt (R) 2,903 60.8% Alton Parker (D) 1,739 36.4% 136 [+] 2.8% 4,778 6 4 1.96%
1900 72% William J. Bryan (D) 2,138 53.0% William McKinley* (R) 1,807 44.8% 89 [+] 2.2% 4,034 3 -7 1.83%
* incumbent         PSV: percent of state vote



2020 President, Jefferson County, CO
CandidateVotesPct
Joe Biden (D) 218,396 57.9%
Donald Trump* (R) 148,417 39.3%
Jo Jorgensen (Lbt) 6,394 1.7%
Other 4,151 1.1%
TOTAL 377,358
Turnout: 81% Diff (St): -3 Diff (US): -7


2016 President, Jefferson County, CO
CandidateVotesPct
Hillary Clinton (D) 160,776 48.9%
Donald Trump (R) 138,177 42.0%
Gary Johnson (Lbt) 18,537 5.6%
Jill Stein (Grn) 4,579 1.4%
Evan McMullin (I) 3,539 1.1%
Other 3,275 1.0%
TOTAL 328,883
Turnout: 74% Diff (St): -1 Diff (US): -4


2012 President, Jefferson County, CO
CandidateVotesPct
Barack Obama* (D) 159,296 51.2%
Mitt Romney (R) 144,197 46.4%
Gary Johnson (Lbt) 4,660 1.5%
Other 2,899 0.9%
TOTAL 311,052
Turnout: 73% Diff (St): 0 Diff (US): -1


2008 President, Jefferson County, CO
CandidateVotesPct
Barack Obama (D) 158,158 53.6%
John McCain (R) 131,628 44.6%
Ralph Nader (I) 1,892 0.6%
Bob Barr (Lbt) 1,464 0.5%
Other 1,926 0.7%
TOTAL 295,068
Turnout: 72% Diff (St): 0 Diff (US): -1


2004 President, Jefferson County, CO
CandidateVotesPct
George W. Bush* (R) 140,644 51.8%
John Kerry (D) 126,558 46.6%
Ralph Nader (I) 1,730 0.6%
Other 2,636 1.0%
TOTAL 271,568
Turnout: 67% Diff (St): 0 Diff (US): 1


2000 President, Jefferson County, CO
CandidateVotesPct
George W. Bush (R) 120,138 51.0%
Albert Gore, Jr. (D) 100,970 42.9%
Ralph Nader (Grn) 10,336 4.4%
Pat Buchanan (Ref) 1,377 0.6%
Other 2,670 1.1%
TOTAL 235,491
Turnout: 60% Diff (St): 0 Diff (US): 3


1996 President, Jefferson County, CO
CandidateVotesPct
Bill Clinton* (D) 89,494 42.7%
Robert Dole (R) 101,517 48.4%
Ross Perot (Ref) 12,967 6.2%
Ralph Nader (Grn) 2,600 1.2%
Harry Browne (Lbt) 1,763 0.8%
Other 1,382 0.7%
TOTAL 209,723
Turnout: 57% Diff (St): 3 Diff (US): 8


1992 President, Jefferson County, CO
CandidateVotesPct
Bill Clinton (D) 80,834 36.2%
George Bush* (R) 82,705 37.1%
Ross Perot (I) 58,404 26.2%
Other 1,260 0.6%
TOTAL 223,203
Turnout: 66% Diff (St): 1 Diff (US): 0


1988 President, Jefferson County, CO
CandidateVotesPct
George Bush (R) 110,820 56.4%
Michael Dukakis (D) 81,824 41.6%
Ron Paul (Lbt) 2,735 1.4%
Other 1,132 0.6%
TOTAL 196,511
Turnout: 63% Diff (St): 3 Diff (US): 3


1984 President, Jefferson County, CO
CandidateVotesPct
Ronald Reagan* (R) 124,496 68.9%
Walter Mondale (D) 53,700 29.7%
Other 2,432 1.3%
TOTAL 180,628
Turnout: 63% Diff (St): 5 Diff (US): 10


1980 President, Jefferson County, CO
CandidateVotesPct
Ronald Reagan (R) 97,008 59.7%
Jimmy Carter* (D) 41,525 25.5%
John Anderson (I) 19,530 12.0%
Edward Clark (Lbt) 3,929 2.4%
Other 619 0.4%
TOTAL 162,611
Turnout: 63% Diff (St): 5 Diff (US): 9


1976 President, Jefferson County, CO
CandidateVotesPct
Jimmy Carter (D) 52,782 36.6%
Gerald Ford* (R) 87,080 60.4%
Eugene McCarthy (I) 3,141 2.2%
Other 1,070 0.7%
TOTAL 144,073
Turnout: 69% Diff (St): 6 Diff (US): 12


1972 President, Jefferson County, CO
CandidateVotesPct
Richard Nixon* (R) 80,082 69.9%
George McGovern (D) 31,555 27.5%
John Schmitz (Amer) 1,813 1.6%
Other 1,147 1.0%
TOTAL 114,597
Turnout: 67% Diff (St): 7 Diff (US): 9


1968 President, Jefferson County, CO
CandidateVotesPct
Richard Nixon (R) 50,847 56.8%
Hubert Humphrey (D) 31,392 35.1%
George Wallace (AIP) 6,767 7.6%
Other 496 0.6%
TOTAL 89,502
Turnout: 73% Diff (St): 6 Diff (US): 13


1964 President, Jefferson County, CO
CandidateVotesPct
Lyndon Johnson* (D) 43,162 56.2%
Barry Goldwater (R) 33,398 43.5%
Other 252 0.3%
TOTAL 76,812
Turnout: 79% Diff (St): 5 Diff (US): 5


1960 President, Jefferson County, CO
CandidateVotesPct
John Kennedy (D) 22,962 40.1%
Richard Nixon (R) 34,105 59.6%
Other 137 0.2%
TOTAL 57,204
Turnout: 78% Diff (St): 5 Diff (US): 10


1956 President, Jefferson County, CO
CandidateVotesPct
Dwight Eisenhower* (R) 25,398 63.7%
Adlai Stevenson (D) 14,270 35.8%
Other 197 0.5%
TOTAL 39,865
Turnout: 67% Diff (St): 4 Diff (US): 6


1952 President, Jefferson County, CO
CandidateVotesPct
Dwight Eisenhower (R) 19,971 63.1%
Adlai Stevenson (D) 11,509 36.3%
Other 194 0.6%
TOTAL 31,674
Turnout: 75% Diff (St): 3 Diff (US): 8


1948 President, Jefferson County, CO
CandidateVotesPct
Harry Truman* (D) 9,145 47.4%
Thomas Dewey (R) 9,903 51.3%
Henry Wallace (Prog) 179 0.9%
Other 81 0.4%
TOTAL 19,308
Turnout: 63% Diff (St): 5 Diff (US): 6


1944 President, Jefferson County, CO
CandidateVotesPct
Franklin Roosevelt* (D) 7,277 42.4%
Thomas Dewey (R) 9,815 57.2%
Other 68 0.4%
TOTAL 17,160
Turnout: 70% Diff (St): 4 Diff (US): 11


1940 President, Jefferson County, CO
CandidateVotesPct
Franklin Roosevelt* (D) 7,745 46.6%
Wendell Willkie (R) 8,780 52.8%
Other 100 0.6%
TOTAL 16,625
Turnout: 90% Diff (St): 2 Diff (US): 8


1936 President, Jefferson County, CO
CandidateVotesPct
Franklin Roosevelt* (D) 7,283 56.8%
Alf Landon (R) 5,271 41.1%
William Lemke (Union) 187 1.5%
Norman Thomas (Soc) 45 0.4%
Other 39 0.3%
TOTAL 12,825
Turnout: 82% Diff (St): 4 Diff (US): 5


1932 President, Jefferson County, CO
CandidateVotesPct
Franklin Roosevelt (D) 6,023 50.0%
Herbert Hoover* (R) 5,522 45.8%
Norman Thomas (Soc) 432 3.6%
Other 71 0.6%
TOTAL 12,048
Turnout: 89% Diff (St): 4 Diff (US): 6


1928 President, Jefferson County, CO
CandidateVotesPct
Herbert Hoover (R) 6,754 69.1%
Al Smith (D) 2,880 29.5%
Norman Thomas (Soc) 97 1.0%
Other 44 0.5%
TOTAL 9,775
Turnout: 84% Diff (St): 4 Diff (US): 11


1924 President, Jefferson County, CO
CandidateVotesPct
Calvin Coolidge (R) 4,869 63.7%
John Davis (D) 1,271 16.6%
Robert LaFollette (Prog) 1,485 19.4%
Other 20 0.3%
TOTAL 7,645
Turnout: 77% Diff (St): 7 Diff (US): 10


1920 President, Jefferson County, CO
CandidateVotesPct
Warren Harding (R) 3,593 61.5%
James Cox (D) 1,941 33.2%
Eugene Debs (Soc) 191 3.3%
Parley Christiansen (FL) 76 1.3%
Aaron Watkins (Proh) 39 0.7%
TOTAL 5,840
Turnout: 71% Diff (St): 2 Diff (US): 1


1916 President, Jefferson County, CO
CandidateVotesPct
Woodrow Wilson* (D) 3,368 60.4%
Charles Evans Hughes (R) 2,040 36.6%
Allan Benson (Soc) 139 2.5%
James Hanly (Proh) 21 0.4%
Other 6 0.1%
TOTAL 5,574
Turnout: 65% Diff (St): 2 Diff (US): -10


1912 President, Jefferson County, CO
CandidateVotesPct
Woodrow Wilson (D) 2,309 43.1%
Theodore Roosevelt (Prog) 1,650 30.8%
William Taft* (R) 1,011 18.9%
Eugene Debs (Soc) 307 5.7%
Eugene Chafin (Proh) 79 1.5%
Other 1 0.0%
TOTAL 5,357
Turnout: 63% Diff (St): -3 Diff (US): -4


1908 President, Jefferson County, CO
CandidateVotesPct
William Taft (R) 2,623 48.6%
William J. Bryan (D) 2,583 47.8%
Eugene Debs (Soc) 107 2.0%
Eugene Chafin (Proh) 86 1.6%
TOTAL 5,399
Turnout: 68% Diff (St): 2 Diff (US): -3


1904 President, Jefferson County, CO
CandidateVotesPct
Theodore Roosevelt (R) 2,903 60.8%
Alton Parker (D) 1,739 36.4%
Other 136 2.8%
TOTAL 4,778
Turnout: 71% Diff (St): 6 Diff (US): 4


1900 President, Jefferson County, CO
CandidateVotesPct
William McKinley* (R) 1,807 44.8%
William J. Bryan (D) 2,138 53.0%
Other 89 2.2%
TOTAL 4,034
Turnout: 72% Diff (St): 3 Diff (US): -7
* incumbent

Historical Statewide Election Results for Jefferson County, CO

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

YearTypeTurnout WinnerRunner-Up OtherTotal VotesDiff PSV
2022 S3 65% Michael Bennet* (D) 176,378 58.7% Joe O'Dea (R) 115,978 38.6% 8,000 [+] 2.7% 300,356 -3 12.01%
2022 G 65% Jared Polis* (D) 185,398 61.8% Heidi Ganahl (R) 108,638 36.2% 6,122 [+] 2.0% 300,158 -3 11.96%
2020 S2 81% John Hickenlooper (D) 210,619 55.9% Cory Gardner* (R) 158,276 42.0% 8,066 [+] 2.1% 376,961 -2 11.65%
2018 G 67% Jared Polis (D) 166,455 54.4% Walker Stapleton (R) 127,038 41.5% 12,504 [+] 4.1% 305,997 -1 12.12%
2016 S3 72% Michael Bennet* (D) 163,172 50.8% Darryl Glenn (R) 139,237 43.3% 18,962 [+] 5.9% 321,371 -1 11.72%
2014 S2 59% Mark Udall* (D) 121,109 47.3% Cory Gardner (R) 120,240 46.9% 14,795 [+] 5.8% 256,144 -1 12.55%
2014 G 59% John Hickenlooper* (D) 130,196 50.8% Bob Beauprez (R) 114,398 44.6% 11,843 [+] 4.6% 256,437 -1 12.56%
2010 S3 54% Michael Bennet* (D) 108,954 48.4% Ken Buck (R) 103,657 46.0% 12,636 [+] 5.6% 225,247 0 12.71%
2010 G 55% John Hickenlooper (D) 116,120 50.8% Tom Tancredo (I) 94,375 41.3% 18,081 [+] 7.9% 228,576 -4 12.79%
2008 S2 70% Mark Udall (D) 151,616 52.6% Bob Schaffer (R) 121,889 42.3% 14,548 [+] 5.1% 288,053 0 12.35%
2006 G 51% Bill Ritter* (D) 119,420 57.5% Bob Beauprez (R) 82,314 39.7% 5,825 [+] 2.8% 207,559 -1 13.32%
2004 S3 67% Ken Salazar (D) 137,544 50.9% Pete Coors (R) 127,048 47.0% 5,462 [+] 2.0% 270,054 1 12.81%
2002 S2 48% Wayne Allard* (R) 95,680 50.5% Tom Strickland (D) 86,278 45.6% 7,444 [+] 3.9% 189,402 0 13.38%
2002 G 47% Bill Owens* (R) 122,356 64.7% Rollie Heath (D) 60,656 32.1% 6,087 [+] 3.2% 189,099 2 13.39%
1998 S3 50% Ben Nighthorse Campbell* (R) 117,019 62.1% Dottie Lamm (D) 66,581 35.3% 4,767 [+] 2.5% 188,367 0 14.19%
1998 G 49% Bill Owens (R) 94,387 50.3% Gail Schoettler (D) 88,561 47.2% 4,820 [+] 2.6% 187,768 1 14.21%
1996 S2 54% Wayne Allard (R) 105,119 53.3% Tom Strickland (D) 86,773 44.0% 5,328 [+] 2.7% 197,220 2 13.42%
1994 G 44% Roy Romer* (D) 87,815 56.2% Bruce Benson (R) 58,861 37.7% 9,467 [+] 6.1% 156,143 -1 13.99%
1992 S3 66% Ben Nighthorse Campbell (D) 108,708 49.2% Terry Considine (R) 98,091 44.4% 14,096 [+] 6.4% 220,895 2 14.23%
1990 S2 46% Hank Brown (R) 83,212 56.0% Josie Heath (D) 60,096 40.5% 5,181 [+] 3.5% 148,489 0 14.53%
1990 G 46% Roy Romer* (D) 92,770 62.7% John Andrews (R) 50,778 34.3% 4,465 [+] 3.0% 148,013 -1 14.63%
1986 S3 48% Ken Kramer (R) 71,598 49.9% Tim Wirth (D) 69,274 48.3% 2,524 [+] 1.8% 143,396 2 13.52%
1986 G 49% Roy Romer (D) 82,031 56.9% Ted Strickland (R) 60,987 42.3% 1,206 [+] 0.8% 144,224 1 13.62%
1984 S2 63% William Armstrong* (R) 124,278 69.0% Nancy Dick (D) 53,903 29.9% 1,826 [+] 1.0% 180,007 5 13.87%
1982 G 48% Richard Lamm* (D) 85,455 65.8% John Fuhr (R) 40,796 31.4% 3,656 [+] 2.8% 129,907 0 13.59%
1980 S3 62% Mary Buchanan (R) 81,766 50.8% Gary Hart* (D) 77,764 48.3% 1,515 [+] 0.9% 161,045 2 13.72%
1978 S2 48% William Armstrong (R) 71,825 65.7% Floyd Haskell* (D) 36,642 33.5% 801 [+] 0.7% 109,268 7 13.34%
1978 G 48% Richard Lamm* (D) 61,960 56.9% Ted Strickland (R) 43,606 40.0% 3,375 [+] 3.1% 108,941 2 13.22%
1974 S3 56% Gary Hart (D) 57,258 54.2% Peter Dominick* (R) 44,671 42.3% 3,686 [+] 3.5% 105,615 3 12.81%
1974 G 56% John Vanderhoof* (R) 53,940 51.0% Richard Lamm (D) 50,757 47.9% 1,168 [+] 1.1% 105,865 5 12.77%
1972 S2 65% Gordon Allott* (R) 61,567 55.3% Floyd Haskell (D) 48,533 43.6% 1,235 [+] 1.1% 111,335 7 12.02%
1970 G 52% John Love* (R) 46,003 61.9% Mark Hogan (D) 27,370 36.8% 976 [+] 1.3% 74,349 9 11.12%
1968 S3 71% Peter Dominick* (R) 55,574 64.1% Stephen McNichols (D) 31,067 35.9% 0 0.0% 86,641 6 11.03%
1966 S2 58% Gordon Allott* (R) 40,467 63.7% Roy Romer (D) 23,106 36.3% 0 0.0% 63,573 6 10.01%
1966 G 61% John Love* (R) 43,923 65.6% Robert Knous (D) 22,569 33.7% 469 [+] 0.7% 66,961 12 10.14%
1962 S3 61% Peter Dominick (R) 30,579 58.9% John Carroll* (D) 20,919 40.3% 423 [+] 0.8% 51,921 5 8.46%
1962 G 61% John Love (R) 31,017 59.7% Stephen McNichols* (D) 20,612 39.7% 343 [+] 0.7% 51,972 3 8.43%
1960 S2 77% Gordon Allott* (R) 32,430 57.8% Robert Knous (D) 23,327 41.6% 315 [+] 0.6% 56,072 4 7.71%
*: 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 Jefferson County, CO

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

DateDistrictWinnerRunner-Up OtherTotal Votes
2022-11-08 CO02Joe Neguse* (D) 651 58.9% Marshall Dawson (R) 421 38.1% 34 3.1% 1,106
2022-11-08 CO06Jason Crow* (D) 16,348 50.4% Steven Monahan (R) 15,471 47.7% 643 2.0% 32,462
2022-11-08 CO07Brittany Pettersen (D) 157,423 59.7% Erik Aadland (R) 100,712 38.2% 5,767 2.2% 263,902
County Total for 2022-11-08:   297,470
2020-11-03 CO01Shane Bolling (R) 23,346 50.4% Diana DeGette* (D) 21,644 46.7% 1,363 2.9% 46,353
2020-11-03 CO02Joe Neguse* (D) 29,143 50.6% Charlie Winn (R) 26,719 46.4% 1,724 3.0% 57,586
2020-11-03 CO07Ed Perlmutter* (D) 155,764 59.4% Casper Stockham (R) 99,044 37.7% 7,634 2.9% 262,442
County Total for 2020-11-03:   366,381
2018-11-06 CO01Casper Stockham (R) 19,721 50.8% Diana DeGette* (D) 17,961 46.2% 1,167 3.0% 38,849
2018-11-06 CO02Joe Neguse (D) 24,426 49.5% Peter Yu (R) 22,005 44.6% 2,888 5.9% 49,319
2018-11-06 CO07Ed Perlmutter* (D) 130,878 60.5% Mark Barrington (R) 77,047 35.6% 8,565 4.0% 216,490
County Total for 2018-11-06:   304,658
2016-11-08 CO01Casper Stockham (R) 23,061 56.0% Diana DeGette* (D) 16,428 39.9% 1,695 4.1% 41,184
2016-11-08 CO02Nicholas Morse (R) 24,763 48.8% Jared Polis* (D) 22,930 45.2% 3,035 6.0% 50,728
2016-11-08 CO07Ed Perlmutter* (D) 122,489 54.5% George Athanasopoulos (R) 91,592 40.7% 10,871 4.8% 224,952
County Total for 2016-11-08:   316,864
2014-11-04 CO01Martin Walsh (R) 18,816 56.0% Diana DeGette* (D) 12,888 38.4% 1,893 5.6% 33,597
2014-11-04 CO02George Leing (R) 23,098 55.3% Jared Polis* (D) 18,696 44.7% 0 0.0% 41,794
2014-11-04 CO07Ed Perlmutter* (D) 96,425 54.8% Don Ytterberg (R) 79,663 45.2% 0 0.0% 176,088
County Total for 2014-11-04:   251,479
2012-11-06 CO01Danny Stroud (R) 21,048 52.9% Diana DeGette* (D) 16,709 42.0% 2,010 5.1% 39,767
2012-11-06 CO02Kevin Lundberg (R) 24,740 50.9% Jared Polis* (D) 21,195 43.6% 2,633 5.4% 48,568
2012-11-06 CO07Ed Perlmutter* (D) 111,809 52.3% Joe Coors (R) 91,141 42.6% 10,901 5.1% 213,851
County Total for 2012-11-06:   302,186
2010-11-02 CO01Mike Fallon (R) 2 66.7% 1 33.3% 3
2010-11-02 CO02Stephen Bailey (R) 10,623 47.7% Jared Polis* (D) 10,421 46.8% 1,224 5.5% 22,268
2010-11-02 CO06Mike Coffman* (R) 44,575 62.3% John Flerlage (D) 24,693 34.5% 2,247 3.1% 71,515
2010-11-02 CO07Ed Perlmutter* (D) 68,589 52.3% Ryan Frazier (R) 56,504 43.1% 6,022 4.6% 131,115
County Total for 2010-11-02:   224,901
2008-11-04 CO01George Lilly (R) 2 66.7% Diana DeGette* (D) 1 33.3% 0 0.0% 3
2008-11-04 CO02Jared Polis (D) 15,368 53.3% Scott Starin (R) 12,488 43.3% 953 3.3% 28,809
2008-11-04 CO06Mike Coffman (R) 51,243 58.2% Hank Eng (D) 36,845 41.8% 0 0.0% 88,088
2008-11-04 CO07Ed Perlmutter* (D) 101,035 61.5% John Lerew (R) 63,242 38.5% 0 0.0% 164,277
County Total for 2008-11-04:   281,177
2006-11-07 CO01Thomas Kelly (Green) 1 100.0% 0 0.0% 1
2006-11-07 CO02Mark Udall* (D) 11,377 58.9% Rich Mancuso (R) 7,374 38.2% 573 3.0% 19,324
2006-11-07 CO06Tom Tancredo* (R) 36,505 56.1% Bill Winter (D) 27,478 42.2% 1,133 1.7% 65,116
2006-11-07 CO07Ed Perlmutter (D) 66,197 54.5% Rick O'Donnell (R) 51,551 42.4% 3,706 3.1% 121,454
County Total for 2006-11-07:   205,895
2004-11-02 CO01Roland Chicas (R) 4 100.0% 0 0.0% 4
2004-11-02 CO02Mark Udall* (D) 14,855 58.2% Stephen Hackman (R) 10,193 39.9% 484 1.9% 25,532
2004-11-02 CO06Tom Tancredo* (R) 46,628 56.7% Joanna Conti (D) 34,467 41.9% 1,181 1.4% 82,276
2004-11-02 CO07Bob Beauprez* (R) 85,840 55.9% Dave Thomas (D) 64,359 41.9% 3,411 2.2% 153,610
County Total for 2004-11-02:   261,422
2002-11-05 CO01Ken Chlouber (R) 1 100.0% 0 0.0% 1
2002-11-05 CO02Mark Udall* (D) 8,546 51.3% Sandy Hume (R) 7,624 45.7% 495 3.0% 16,665
2002-11-05 CO06Tom Tancredo* (R) 36,811 63.6% Lance Wright (D) 19,181 33.1% 1,883 3.3% 57,875
2002-11-05 CO07Bob Beauprez (R) 54,680 48.5% Mike Feeley (D) 51,976 46.1% 5,992 5.3% 112,648
County Total for 2002-11-05:   187,189
2000-11-07 CO02Mark Udall (D) 40,099 51.3% Carolyn Cox (R) 35,196 45.0% 2,924 3.7% 78,219
2000-11-07 CO03Scott McInnis* (R) 1,206 64.0% Curtis Imrie (D) 586 31.1% 91 4.8% 1,883
2000-11-07 CO06Tom Tancredo (R) 79,467 54.4% Kenneth Toltz (D) 60,710 41.6% 5,918 4.1% 146,095
County Total for 2000-11-07:   226,197
1998-11-03 CO02Bob Greenlee (R) 35,592 54.6% Mark Udall (D) 27,658 42.5% 1,889 2.9% 65,139
1998-11-03 CO03Scott McInnis* (R) 998 62.6% Reed Kelley (D) 536 33.6% 61 3.8% 1,595
1998-11-03 CO06Tom Tancredo (R) 60,993 57.3% Henry Strauss (D) 42,282 39.7% 3,099 2.9% 106,374
County Total for 1998-11-03:   173,108
1996-11-05 CO02David Skaggs* (D) 35,918 49.9% Patricia Miller (R) 33,044 45.9% 3,087 4.3% 72,049
1996-11-05 CO03Scott McInnis* (R) 1,136 67.5% Albert Gurule (D) 547 32.5% 0 0.0% 1,683
1996-11-05 CO06Dan Schaefer* (R) 81,636 61.2% Joan Fitzgerald (D) 51,814 38.8% 0 0.0% 133,450
County Total for 1996-11-05:   207,182
1994-11-08 CO02David Skaggs* (D) 26,903 50.0% Patricia Miller (R) 26,889 50.0% 0 0.0% 53,792
1994-11-08 CO03Scott McInnis* (R) 880 71.5% Linda Powers (D) 350 28.5% 0 0.0% 1,230
1994-11-08 CO06Dan Schaefer* (R) 68,671 68.9% John Hallen (D) 28,675 28.8% 2,340 2.3% 99,686
County Total for 1994-11-08:   154,708
1992-11-03 CO02David Skaggs* (D) 40,955 54.1% Bryan Day (R) 29,826 39.4% 4,862 6.4% 75,643
1992-11-03 CO03Scott McInnis (R) 864 57.1% Mike Callihan (D) 593 39.2% 56 3.7% 1,513
1992-11-03 CO06Dan Schaefer* (R) 68,918 60.3% Tom Kolbe (D) 45,307 39.7% 0 0.0% 114,225
County Total for 1992-11-03:   191,381
*: incumbent           sp: special election           RO: runoff election

Voter Registration Data for Jefferson County, CO

YearTotalRepublicanDemocratOtherR/D EdgeR/D Edge %VAPOP %
2023 462,021 99,900 21.6% 128,569 27.8% 233,552 50.6% Dem +28,669 Dem +6.2% 99%
2022 463,838 105,051 22.6% 131,623 28.4% 227,164 49.0% Dem +26,572 Dem +5.7% 100%
2020 457,461 116,239 25.4% 134,805 29.5% 206,417 45.1% Dem +18,566 Dem +4.1% 98%
2018 439,897 122,712 27.9% 131,018 29.8% 186,167 42.3% Dem +8,306 Dem +1.9% 97%
2016 426,336 129,033 30.3% 130,314 30.6% 166,989 39.2% Dem +1,281 Dem +0.3% 96%
2014 425,397 134,141 31.5% 126,295 29.7% 164,961 38.8% Rep +7,846 Rep +1.8% 98%
2012 414,457 134,848 32.5% 125,907 30.4% 153,702 37.1% Rep +8,941 Rep +2.2% 97%
2010 380,222 128,564 33.8% 120,581 31.7% 131,077 34.5% Rep +7,983 Rep +2.1% 92%
2008 370,878 127,215 34.3% 118,114 31.8% 125,549 33.9% Rep +9,101 Rep +2.5% 90%
2006 359,318 132,978 37.0% 105,950 29.5% 120,390 33.5% Rep +27,028 Rep +7.5% 88%
2004 377,607 143,609 38.0% 110,517 29.3% 123,481 32.7% Rep +33,092 Rep +8.8% 94%
2002 354,097 134,404 38.0% 98,809 27.9% 120,884 34.1% Rep +35,595 Rep +10.1% 89%
2000 356,032 134,340 37.7% 96,602 27.1% 125,090 35.1% Rep +37,738 Rep +10.6% 90%
1998 331,761 124,361 37.5% 89,301 26.9% 118,099 35.6% Rep +35,060 Rep +10.6% 87%
1996 295,485 113,365 38.4% 80,068 27.1% 102,052 34.5% Rep +33,297 Rep +11.3% 81%
1994 278,853 100,877 36.2% 78,598 28.2% 99,378 35.6% Rep +22,279 Rep +8.0% 79%
1992 281,880 100,141 35.5% 80,690 28.6% 101,049 35.8% Rep +19,451 Rep +6.9% 84%
1990 276,407 98,104 35.5% 65,743 23.8% 112,560 40.7% Rep +32,361 Rep +11.7% 86%
1988 288,924 99,549 34.5% 66,328 23.0% 123,047 42.6% Rep +33,221 Rep +11.5% 93%
1986 250,247 86,828 34.7% 56,606 22.6% 106,813 42.7% Rep +30,222 Rep +12.1% 84%
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.