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Warren County, IA


Metropolitan Statistical Area: Des Moines-West Des Moines, IA
Designated Market Area: Des Moines-Ames, IA-MO
American Communities Project County Type (2023): Exurbs

Places in Warren County, IA     [Sort places by name]

 

Tracts in Warren County, IA

   



Click here to view demographic data for Warren County, IA

2024 population: 56,343   ( 3,946 from 2020)
Land area: 569.8 square miles
Population density: 98.9 persons per square mile

2024 Census data
White:51,811 91.96% 5.7%
Black:6661.18% 41.1%
Indian:1310.23% 2.3%
Asian:5881.04% 30.1%
2+ races:7621.35% 12.4%
Hispanic:2,3854.23% 44.5%
Total non-White:4,5328.04% 34.1%

2020-2024 ComponentsNumberRate
Births:2,530 12.1
Deaths:2,20110.5
Net Migration: 3,48016.6
Net Immigration: 1300.6
Change in White population:2,794 5.3
Change in Non-White pop.:1,152 2.2



Historical Presidential Election Results for Warren County, IA

Recent Trends
VotesΔ MarginSwing %
2024 vs. 2020 R +1,704 R +1,566 R + 3.9%
D +138
2024 vs. 2016 R +4,672 R +2,371 R + 3.6%
D +2,301
2020 vs. 2016 R +2,968 R +805 D + 0.3%
D +2,163
2024 vs. 2012 R +6,434 R +6,273 R + 19.1%
D +161
2016 vs. 2008 R +2,670 R +4,558 R + 18.1%
D -1,888
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 78% Donald Trump (R) 19,486 59.4% Kamala Harris (D) 12,712 38.8% 606 [+] 1.8% 32,804 4 10 1.97%
2020 78% Donald Trump* (R) 17,782 57.3% Joe Biden (D) 12,574 40.5% 683 [+] 2.2% 31,039 4 10 1.84%
2016 73% Donald Trump (R) 14,814 54.3% Hillary Clinton (D) 10,411 38.1% 2,075 [+] 7.6% 27,300 3 8 1.74%
2012 74% Mitt Romney (R) 13,052 50.1% Barack Obama* (D) 12,551 48.1% 469 [+] 1.8% 26,072 4 3 1.65%
2008 75% Barack Obama (D) 12,299 49.4% John McCain (R) 12,144 48.8% 446 [+] 1.8% 24,889 4 3 1.62%
2004 73% George W. Bush* (R) 12,160 52.7% John Kerry (D) 10,730 46.5% 163 [+] 0.7% 23,053 3 2 1.53%
2000 66% George W. Bush (R) 9,621 49.0% Albert Gore, Jr. (D) 9,521 48.4% 511 [+] 2.6% 19,653 1 1 1.49%
1996 62% Bill Clinton* (D) 9,120 52.2% Robert Dole (R) 6,905 39.5% 1,447 [+] 8.3% 17,472 0 -1 1.42%
1992 72% Bill Clinton (D) 8,612 45.0% George Bush* (R) 7,242 37.8% 3,303 [+] 17.2% 19,157 1 0 1.41%
1988 63% Michael Dukakis (D) 9,627 59.7% George Bush (R) 6,424 39.8% 80 [+] 0.5% 16,131 -5 -14 1.32%
1984 68% Ronald Reagan* (R) 8,277 50.0% Walter Mondale (D) 8,171 49.3% 122 0.7% 16,570 -3 -9 1.26%
1980 66% Ronald Reagan (R) 7,360 47.4% Jimmy Carter* (D) 6,610 42.6% 1,549 [+] 10.0% 15,519 -4 -3 1.18%
1976 70% Jimmy Carter (D) 7,653 54.2% Gerald Ford* (R) 6,099 43.2% 356 [+] 2.5% 14,108 -6 -5 1.10%
1972 70% Richard Nixon* (R) 7,332 57.3% George McGovern (D) 5,143 40.2% 329 [+] 2.6% 12,804 0 -3 1.04%
1968 75% Richard Nixon (R) 5,619 50.3% Hubert Humphrey (D) 4,613 41.3% 939 [+] 8.4% 11,171 -3 7 0.96%
1964 78% Lyndon Johnson* (D) 6,639 64.1% Barry Goldwater (R) 3,679 35.5% 33 0.3% 10,351 -2 -3 0.87%
1960 86% Richard Nixon (R) 6,013 59.2% John Kennedy (D) 4,136 40.8% 0 0.0% 10,149 3 10 0.80%
1956 78% Dwight Eisenhower* (R) 5,430 59.2% Adlai Stevenson (D) 3,729 40.6% 15 0.2% 9,174 0 2 0.74%
1952 81% Dwight Eisenhower (R) 5,911 65.6% Adlai Stevenson (D) 3,042 33.7% 64 0.7% 9,017 2 10 0.71%
1948 71% Thomas Dewey (R) 3,876 51.0% Harry Truman* (D) 3,481 45.8% 248 [+] 3.3% 7,605 3 6 0.73%
1944 71% Thomas Dewey (R) 4,266 55.8% Franklin Roosevelt* (D) 3,319 43.4% 56 0.7% 7,641 4 10 0.73%
1940 83% Wendell Willkie (R) 5,016 56.2% Franklin Roosevelt* (D) 3,856 43.2% 51 0.6% 8,923 4 11 0.73%
1936 87% Alf Landon (R) 4,642 52.7% Franklin Roosevelt* (D) 4,011 45.6% 152 [+] 1.7% 8,805 10 16 0.77%
1932 73% Herbert Hoover* (R) 3,725 50.3% Franklin Roosevelt (D) 3,542 47.8% 141 [+] 1.9% 7,408 10 11 0.71%
1928 76% Herbert Hoover (R) 5,294 70.3% Al Smith (D) 2,239 29.7% 0 0.0% 7,533 8 12 0.75%
1924 75% Calvin Coolidge (R) 4,683 62.1% Robert LaFollette (Prog) 1,579 21.0% 1,274 [+] 16.9% 7,536 7 8 0.77%
1920 75% Warren Harding (R) 5,323 70.5% James Cox (D) 2,066 27.4% 160 [+] 2.1% 7,549 0 10 0.84%
1916 43% Charles Evans Hughes (R) 2,182 52.2% Woodrow Wilson* (D) 1,910 45.7% 87 [+] 2.1% 4,179 -2 6 0.81%
1912 41% Woodrow Wilson (D) 1,396 34.5% William Taft* (R) 1,386 34.2% 1,269 [+] 31.3% 4,051 10 11 0.82%
1908 46% William Taft (R) 2,589 58.6% William J. Bryan (D) 1,645 37.2% 185 [+] 4.2% 4,419 3 7 0.89%
1904 44% Theodore Roosevelt (R) 2,938 66.2% Alton Parker (D) 1,191 26.8% 309 [+] 7.0% 4,438 3 10 0.91%
1900 48% William McKinley* (R) 2,966 59.2% William J. Bryan (D) 1,876 37.4% 172 [+] 3.4% 5,014 1 8 0.95%
* incumbent         PSV: percent of state vote

Historical Statewide Election Results for Warren County, IA

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

YearTypeTurnout WinnerRunner-Up OtherTotal VotesDiff PSV
2022 S3 56% Charles Grassley* (R) 14,052 59.2% Michael Franken (D) 9,634 40.6% 52 [+] 0.2% 23,738 3 1.95%
2022 G 56% Kim Reynolds* (R) 14,631 61.4% Deidre DeJear (D) 8,531 35.8% 675 [+] 2.8% 23,837 3 1.95%
2020 S2 77% Joni Ernst* (R) 17,276 56.3% Theresa Greenfield (D) 12,478 40.6% 949 [+] 3.1% 30,703 5 1.84%
2018 G 63% Kim Reynolds* (R) 12,801 52.8% Fred Hubbell (D) 10,942 45.1% 518 [+] 2.1% 24,261 3 1.83%
2016 S3 72% Charles Grassley* (R) 17,081 63.5% Patty Judge (D) 8,700 32.4% 1,098 [+] 4.1% 26,879 3 1.74%
2014 S2 54% Joni Ernst (R) 10,861 55.7% Bruce Braley (D) 7,784 39.9% 852 [+] 4.4% 19,497 4 1.73%
2014 G 54% Terry Branstad* (R) 11,509 58.8% Jack Hatch (D) 7,123 36.4% 933 [+] 4.8% 19,565 0 1.73%
2010 S3 59% Charles Grassley* (R) 13,273 65.9% Roxanne Conlin (D) 6,429 31.9% 450 [+] 2.2% 20,152 2 1.81%
2010 G 59% Terry Branstad (R) 10,653 52.7% Chet Culver* (D) 8,431 41.7% 1,120 [+] 5.5% 20,204 0 1.80%
2008 S2 73% Tom Harkin* (D) 13,979 57.1% Christopher Reed (R) 10,471 42.8% 17 [+] 0.1% 24,467 6 1.63%
2006 G 54% Chet Culver (D) 9,051 52.0% Jim Nussle (R) 8,103 46.5% 267 [+] 1.5% 17,421 2 1.65%
2004 S3 71% Charles Grassley* (R) 16,018 71.2% Art Small (D) 6,163 27.4% 311 [+] 1.4% 22,492 1 1.52%
2002 S2 53% Tom Harkin* (D) 9,145 56.4% Greg Ganske (R) 6,819 42.0% 263 [+] 1.6% 16,227 -2 1.59%
2002 G 53% Tom Vilsack* (D) 8,931 55.2% Doug Gross (R) 6,891 42.6% 355 [+] 2.2% 16,177 -2 1.58%
1998 S3 49% Charles Grassley* (R) 9,414 66.7% David Osterberg (D) 4,577 32.4% 127 [+] 0.9% 14,118 -2 1.49%
1998 G 49% Tom Vilsack (D) 7,676 54.1% Jim Ross Lightfoot (R) 6,421 45.2% 101 [+] 0.7% 14,198 -1 1.48%
1996 S2 62% Tom Harkin* (D) 9,151 52.8% Jim Ross Lightfoot (R) 8,043 46.4% 140 [+] 0.8% 17,334 0 1.42%
1994 G 52% Terry Branstad* (R) 7,735 53.8% Bonnie Campbell (D) 6,465 45.0% 177 [+] 1.2% 14,377 -3 1.44%
1992 S3 65% Charles Grassley* (R) 11,537 66.5% Jean Lloyd-Jones (D) 5,228 30.1% 592 [+] 3.4% 17,357 -3 1.34%
1990 S2 53% Tom Harkin* (D) 8,865 64.8% Tom Tauke (R) 4,822 35.2% 4 [+] 0.0% 13,691 -11 1.39%
1990 G 53% Terry Branstad* (R) 7,581 55.5% Donald Avenson (D) 6,018 44.1% 49 [+] 0.4% 13,648 -5 1.40%
1986 S3 46% Charles Grassley* (R) 6,944 60.3% John Roehrick (D) 4,550 39.5% 27 [+] 0.2% 11,521 -6 1.29%
1986 G 47% Lowell Junkins (D) 6,143 52.5% Terry Branstad* (R) 5,542 47.4% 5 [+] 0.0% 11,690 -4 1.28%
1984 S2 67% Tom Harkin (D) 10,331 63.3% Roger Jepsen* (R) 5,871 36.0% 129 [+] 0.8% 16,331 -8 1.26%
1982 G 54% Roxanne Conlin (D) 7,045 54.4% Terry Branstad (R) 5,807 44.9% 90 [+] 0.7% 12,942 -8 1.25%
1980 S3 64% John Culver* (D) 7,834 51.6% Charles Grassley (R) 7,200 47.4% 146 [+] 1.0% 15,180 -6 1.19%
1978 S2 46% Dick Clark* (D) 5,403 55.3% Roger Jepsen (R) 4,244 43.4% 125 [+] 1.3% 9,772 -8 1.18%
1978 G 48% Robert Ray* (R) 5,313 52.7% Jerry Fitzgerald (D) 4,702 46.6% 76 [+] 0.8% 10,091 -6 1.20%
1974 S3 49% John Culver (D) 5,018 53.5% David Stanley (R) 4,287 45.7% 82 [+] 0.9% 9,387 -2 1.06%
1974 G 50% Robert Ray* (R) 5,297 55.0% James Schaben (D) 4,230 43.9% 98 [+] 1.0% 9,625 -3 1.05%
1972 S2 69% Dick Clark (D) 7,220 57.2% Jack Miller* (R) 5,260 41.7% 139 [+] 1.1% 12,619 -2 1.05%
1972 G 70% Robert Ray* (R) 7,022 55.1% Paul Franzenburg (D) 5,495 43.1% 223 [+] 1.8% 12,740 -3 1.05%
1970 G 48% Robert Ray* (R) 3,852 49.4% Robert Fulton (D) 3,494 44.8% 459 [+] 5.9% 7,805 -2 0.99%
1968 S3 74% Harold Hughes (D) 5,910 53.7% David Stanley (R) 5,085 46.2% 13 [+] 0.1% 11,008 -3 0.96%
1968 G 74% Robert Ray (R) 5,523 50.0% Paul Franzenburg (D) 5,509 49.9% 8 [+] 0.1% 11,040 -4 0.97%
1966 S2 55% Jack Miller* (R) 4,578 58.6% E.B. Smith (D) 3,069 39.3% 159 [+] 2.0% 7,806 -2 0.91%
1966 G 56% Harold Hughes* (D) 4,579 57.7% William Murray (R) 3,248 40.9% 113 [+] 1.4% 7,940 -3 0.89%
1964 G 77% Harold Hughes* (D) 7,349 71.4% Evan Hultman (R) 2,824 27.4% 126 [+] 1.2% 10,299 -4 0.88%
1962 S3 56% Bourke Hickenlooper* (R) 3,563 50.4% E.B. Smith (D) 3,507 49.6% 0 0.0% 7,070 -3 0.88%
1962 G 57% Harold Hughes (D) 4,113 57.8% Norman Erbe* (R) 3,006 42.2% 0 0.0% 7,119 -5 0.87%
1960 S2 84% Jack Miller (R) 5,180 52.0% Herschel Loveless (D) 4,790 48.0% 0 0.0% 9,970 0 0.81%
1960 G 84% Norman Erbe (R) 5,347 53.6% Edward McManus (D) 4,625 46.4% 0 0.0% 9,972 1 0.81%
*: 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 Warren County, IA

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

DateDistrictWinnerRunner-Up OtherTotal Votes
2024-11-05 IA01Mariannette Miller-Meeks* (R) 17,706 55.4% Christina Bohannan (D) 14,143 44.3% 85 0.3% 31,934
County Total for 2024-11-05:   31,934
2022-11-08 IA01Mariannette Miller-Meeks* (R) 14,046 59.5% Christina Bohannan (D) 9,517 40.3% 25 0.1% 23,588
County Total for 2022-11-08:   23,588
2020-11-03 IA03David Young (R) 16,473 54.2% Cindy Axne* (D) 12,698 41.8% 1,202 4.0% 30,373
County Total for 2020-11-03:   30,373
2018-11-06 IA03David Young* (R) 12,778 53.1% Cindy Axne (D) 10,363 43.1% 910 3.8% 24,051
County Total for 2018-11-06:   24,051
2016-11-08 IA03David Young* (R) 15,393 58.1% Jim Mowrer (D) 9,471 35.7% 1,632 6.2% 26,496
County Total for 2016-11-08:   26,496
2014-11-04 IA03David Young (R) 10,528 54.3% Staci Appel (D) 7,955 41.1% 893 4.6% 19,376
County Total for 2014-11-04:   19,376
2012-11-06 IA03Tom Latham* (R) 14,167 55.8% Leonard Boswell* (D) 10,201 40.2% 1,039 4.1% 25,407
County Total for 2012-11-06:   25,407
2010-11-02 IA04Tom Latham* (R) 12,793 64.4% Bill Maske (D) 6,705 33.8% 354 1.8% 19,852
County Total for 2010-11-02:   19,852
2008-11-04 IA04Tom Latham* (R) 14,005 57.7% Becky Greenwald (D) 10,236 42.2% 13 0.1% 24,254
County Total for 2008-11-04:   24,254
2006-11-07 IA04Tom Latham* (R) 9,772 58.1% Selden Spencer (D) 7,039 41.9% 8 0.0% 16,819
County Total for 2006-11-07:   16,819
2004-11-02 IA04Tom Latham* (R) 13,251 60.6% Paul Johnson (D) 8,619 39.4% 7 0.0% 21,877
County Total for 2004-11-02:   21,877
2002-11-05 IA04Tom Latham* (R) 8,132 51.1% John Norris (D) 7,453 46.9% 317 2.0% 15,902
County Total for 2002-11-05:   15,902
2000-11-07 IA03Leonard Boswell* (D) 11,999 64.6% Jay Marcus (R) 6,132 33.0% 446 2.4% 18,577
County Total for 2000-11-07:   18,577
1998-11-03 IA03Leonard Boswell* (D) 8,249 58.6% Larry McKibben (R) 5,632 40.0% 197 1.4% 14,078
County Total for 1998-11-03:   14,078
1996-11-05 IA03Leonard Boswell (D) 8,626 51.4% Mike Mahaffey (R) 7,881 47.0% 267 1.6% 16,774
County Total for 1996-11-05:   16,774
1994-11-08 IA03Jim Ross Lightfoot* (R) 8,165 57.8% Elaine Baxter (D) 5,820 41.2% 150 1.1% 14,135
County Total for 1994-11-08:   14,135
1992-11-03 IA03Jim Ross Lightfoot* (R) 9,045 51.1% Elaine Baxter (D) 8,470 47.8% 197 1.1% 17,712
County Total for 1992-11-03:   17,712
*: incumbent           sp: special election           RO: runoff election

Voter Registration Data for Warren County, IA

YearTotalRepublicanDemocratOtherR/D EdgeR/D Edge %VAPOP %
2024 32,063 13,652 42.6% 8,752 27.3% 9,659 30.1% Rep +4,900 Rep +15.3% 76%
2022 34,499 13,559 39.3% 10,046 29.1% 10,894 31.6% Rep +3,513 Rep +10.2% 82%
2020 36,125 13,567 37.6% 11,169 30.9% 11,389 31.5% Rep +2,398 Rep +6.6% 85%
2018 33,793 11,644 34.5% 9,979 29.5% 12,170 36.0% Rep +1,665 Rep +4.9% 83%
2016 33,014 11,795 35.7% 9,821 29.7% 11,398 34.5% Rep +1,974 Rep +6.0% 85%
2014 31,408 10,818 34.4% 9,499 30.2% 11,091 35.3% Rep +1,319 Rep +4.2% 84%
2012 30,796 10,603 34.4% 9,863 32.0% 10,330 33.5% Rep +740 Rep +2.4% 86%
2010 30,578 9,983 32.6% 10,361 33.9% 10,234 33.5% Dem +378 Dem +1.2% 89%
2008 30,130 9,166 30.4% 10,965 36.4% 9,999 33.2% Dem +1,799 Dem +6.0% 90%
2006 29,650 8,831 29.8% 10,367 35.0% 10,452 35.3% Dem +1,536 Dem +5.2% 92%
2004 29,487 8,804 29.9% 10,196 34.6% 10,487 35.6% Dem +1,392 Dem +4.7% 94%
2002 27,802 8,546 30.7% 9,210 33.1% 10,046 36.1% Dem +664 Dem +2.4% 91%
2000 27,370 8,173 29.9% 9,331 34.1% 9,866 36.0% Dem +1,158 Dem +4.2% 92%
1994 23,462 7,808 33.3% 9,574 40.8% 6,080 25.9% Dem +1,766 Dem +7.5% 86%
1986 20,148 5,725 28.4% 8,404 41.7% 6,019 29.9% Dem +2,679 Dem +13.3% 81%
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.