IA · State

Iowa (IA) — Total Data

Year	D	R	Margin (D%, R%, 3rd%)	D Cand.	R Cand.	State Margin	Nat. Margin	Rel. Margin	Total votes	Source	EVs
1864	49,525(35.9%)	88,500(64.1%)	(35.9%, 64.1%, 0.0%)	George B. McClellan	Abraham Lincoln	R+28.2	R+10.1	R+18.2	138,025	Wikipedia	8
1868	74,040(38.1%)(Δ 24,515)	120,399(61.9%)(Δ 31,899)	(38.1%, 61.9%, 0.0%)	Horatio Seymour	Ulysses S. Grant	R+23.8(Δ D+4.4)	R+5.3(Δ D+4.8)	R+18.5(Δ R+0.4)	194,439(Δ 56,414)	Wikipedia	8
1872	81,636(37.9%)(Δ 7,596)	131,566(61.1%)(Δ 11,167)	(37.7%, 60.8%, 1.0%)	Horace Greeley	Ulysses S. Grant	R+23.1(Δ D+0.8)	R+11.8(Δ R+6.5)	R+11.3(Δ D+7.2)	216,365(Δ 21,926)	Wikipedia	11
1876	112,121(38.3%)(Δ 30,485)	171,326(58.5%)(Δ 39,760)	(38.3%, 58.5%, 3.2%)	Samuel J. Tilden	Rutherford B. Hayes	R+20.2(Δ D+2.9)	D+3.0(Δ D+14.8)	R+23.2(Δ R+11.9)	292,878(Δ 76,513)	Wikipedia	11
1880	105,845(32.8%)(Δ -6,276)	183,927(57.0%)(Δ 12,601)	(32.7%, 56.9%, 10.1%)	Winfield Scott Hancock	James A. Garfield	R+24.1(Δ R+3.9)	R+0.1(Δ R+3.1)	R+24.0(Δ R+0.8)	323,498(Δ 30,620)	Wikipedia	11
1884	177,316(47.2%)(Δ 71,471)	197,089(52.4%)(Δ 13,162)	(47.0%, 52.3%, 0.4%)	Grover Cleveland	James G. Blaine	R+5.2(Δ D+18.9)	D+0.6(Δ D+0.7)	R+5.8(Δ D+18.2)	377,201(Δ 53,703)	Wikipedia	13
1888	179,877(44.9%)(Δ 2,561)	211,603(52.8%)(Δ 14,514)	(44.5%, 52.4%, 2.3%)	Grover Cleveland	Benjamin Harrison	R+7.9(Δ R+2.6)	D+0.8(Δ D+0.3)	R+8.7(Δ R+2.9)	404,135(Δ 26,934)	Wikipedia	13
1892	196,367(45.0%)(Δ 16,490)	219,795(50.3%)(Δ 8,192)	(44.3%, 49.6%, 4.6%)	Grover Cleveland	Benjamin Harrison	R+5.3(Δ D+2.6)	D+3.0(Δ D+2.2)	R+8.3(Δ D+0.4)	443,159(Δ 39,024)	Wikipedia	13
1896	223,741(43.2%)(Δ 27,374)	289,293(55.9%)(Δ 69,498)	(42.9%, 55.5%, 0.9%)	William Jennings Bryan	William McKinley	R+12.6(Δ R+7.3)	R+4.3(Δ R+7.3)	R+8.3(Δ D+0.0)	521,547(Δ 78,388)	Wikipedia	13
1900	209,265(39.7%)(Δ -14,476)	307,808(58.5%)(Δ 18,515)	(39.5%, 58.0%, 1.8%)	William Jennings Bryan	William McKinley	R+18.6(Δ R+6.0)	R+6.1(Δ R+1.8)	R+12.5(Δ R+4.2)	530,355(Δ 8,808)	Wikipedia	13
1904	149,276(31.6%)(Δ -59,989)	308,158(65.2%)(Δ 350)	(30.7%, 63.4%, 3.1%)	Alton B. Parker	Theodore Roosevelt	R+32.7(Δ R+14.1)	R+18.8(Δ R+12.7)	R+13.9(Δ R+1.4)	486,093(Δ -44,262)	Wikipedia	13
1908	200,771(41.3%)(Δ 51,495)	275,209(56.6%)(Δ -32,949)	(40.6%, 55.6%, 2.0%)	William Jennings Bryan	William Howard Taft	R+15.0(Δ D+17.6)	R+8.5(Δ D+10.3)	R+6.5(Δ D+7.3)	494,769(Δ 8,676)	Wikipedia	13
1912	185,325(39.7%)(Δ -15,446)	161,819(34.7%)(Δ -113,390)	(37.6%, 32.9%, 24.3%)	Woodrow Wilson	Theodore Roosevelt	D+4.8(Δ D+19.8)	D+14.4(Δ D+23.0)	R+9.7(Δ R+3.2)	492,356(Δ -2,413)	Wikipedia	13
1916	218,699(42.9%)(Δ 33,374)	280,439(55.0%)(Δ 118,620)	(42.6%, 54.6%, 2.1%)	Woodrow Wilson	Charles Evans Hughes	R+12.0(Δ R+16.8)	D+3.1(Δ R+11.3)	R+15.1(Δ R+5.5)	513,942(Δ 21,586)	Wikipedia	13
1920	227,921(25.9%)(Δ 9,222)	634,674(72.2%)(Δ 354,235)	(25.5%, 70.9%, 1.9%)	James M. Cox	Warren G. Harding	R+45.4(Δ R+33.4)	R+26.2(Δ R+29.3)	R+19.3(Δ R+4.1)	895,082(Δ 381,140)	Wikipedia	13
1924	162,600(16.7%)(Δ -65,321)	537,635(55.3%)(Δ -97,039)	(16.6%, 55.0%, 27.9%)	John W. Davis	Calvin Coolidge	R+38.4(Δ D+7.1)	R+25.2(Δ D+1.0)	R+13.2(Δ D+6.1)	976,960(Δ 81,878)	Wikipedia	13
1928	379,311(37.7%)(Δ 216,711)	623,570(62.0%)(Δ 85,935)	(37.6%, 61.8%, 0.3%)	Al Smith	Herbert Hoover	R+24.2(Δ D+14.2)	R+17.4(Δ D+7.8)	R+6.8(Δ D+6.4)	1,009,489(Δ 32,529)	Wikipedia	13
1932	598,019(57.9%)(Δ 218,708)	414,433(40.1%)(Δ -209,137)	(57.7%, 40.0%, 2.0%)	Franklin D. Roosevelt	Herbert Hoover	D+17.7(Δ D+41.9)	D+17.8(Δ D+35.2)	R+0.1(Δ D+6.7)	1,036,687(Δ 27,198)	Wikipedia	11
1936	621,756(54.6%)(Δ 23,737)	487,977(42.8%)(Δ 73,544)	(54.4%, 42.7%, 2.6%)	Franklin D. Roosevelt	Alf Landon	D+11.7(Δ R+6.0)	D+24.3(Δ D+6.5)	R+12.5(Δ R+12.5)	1,142,733(Δ 106,046)	Wikipedia	11
1940	578,800(47.8%)(Δ -42,956)	632,370(52.2%)(Δ 144,393)	(47.6%, 52.0%, 0.0%)	Franklin D. Roosevelt	Wendell Willkie	R+4.4(Δ R+16.1)	D+10.0(Δ R+14.3)	R+14.4(Δ R+1.8)	1,215,430(Δ 72,697)	Wikipedia	11
1944	499,876(47.7%)(Δ -78,924)	547,267(52.2%)(Δ -85,103)	(47.5%, 52.0%, 0.1%)	Franklin D. Roosevelt	Thomas E. Dewey	R+4.5(Δ R+0.1)	D+7.5(Δ R+2.5)	R+12.0(Δ D+2.4)	1,052,599(Δ -162,831)	Wikipedia	10
1948	522,380(50.8%)(Δ 22,504)	494,018(48.0%)(Δ -53,249)	(50.3%, 47.6%, 1.2%)	Harry S. Truman	Thomas E. Dewey	D+2.7(Δ D+7.2)	D+4.5(Δ R+3.0)	R+1.8(Δ D+10.2)	1,038,264(Δ -14,335)	Wikipedia	10
1952	451,513(35.7%)(Δ -70,867)	808,906(63.9%)(Δ 314,888)	(35.6%, 63.8%, 0.4%)	Adlai Stevenson	Dwight D. Eisenhower	R+28.2(Δ R+30.9)	R+10.9(Δ R+15.3)	R+17.3(Δ R+15.6)	1,268,773(Δ 230,509)	Wikipedia	10
1956	501,858(40.7%)(Δ 50,345)	729,187(59.1%)(Δ -79,719)	(40.7%, 59.1%, 0.3%)	Adlai Stevenson	Dwight D. Eisenhower	R+18.4(Δ D+9.8)	R+15.4(Δ R+4.5)	R+3.0(Δ D+14.3)	1,234,564(Δ -34,209)	Wikipedia	10
1960	550,565(43.2%)(Δ 48,707)	722,381(56.7%)(Δ -6,806)	(43.2%, 56.7%, 0.0%)	John F. Kennedy	Richard Nixon	R+13.5(Δ D+4.9)	D+0.2(Δ D+15.6)	R+13.7(Δ R+10.6)	1,273,810(Δ 39,246)	Wikipedia	10
1964	733,030(62.0%)(Δ 182,465)	449,148(38.0%)(Δ -273,233)	(61.9%, 37.9%, 0.0%)	Lyndon B. Johnson	Barry Goldwater	D+24.0(Δ D+37.5)	D+22.6(Δ D+22.4)	D+1.4(Δ D+15.0)	1,184,539(Δ -89,271)	Wikipedia	9
1968	476,699(41.0%)(Δ -256,331)	619,106(53.3%)(Δ 169,958)	(40.8%, 53.0%, 5.7%)	Hubert Humphrey	Richard Nixon	R+12.2(Δ R+36.2)	R+0.7(Δ R+23.3)	R+11.5(Δ R+12.9)	1,167,931(Δ -16,608)	Wikipedia	9
1972	496,206(40.5%)(Δ 19,507)	706,207(57.7%)(Δ 87,101)	(40.5%, 57.6%, 1.8%)	George McGovern	Richard Nixon	R+17.1(Δ R+4.9)	R+23.1(Δ R+22.4)	D+6.0(Δ D+17.5)	1,225,944(Δ 58,013)	Wikipedia	8
1976	619,931(48.7%)(Δ 123,725)	632,863(49.7%)(Δ -73,344)	(48.5%, 49.5%, 1.6%)	Jimmy Carter	Gerald Ford	R+1.0(Δ D+16.1)	D+2.1(Δ D+25.2)	R+3.1(Δ R+9.1)	1,279,306(Δ 53,362)	Wikipedia	8
1980	508,672(39.1%)(Δ -111,259)	676,026(52.0%)(Δ 43,163)	(38.6%, 51.3%, 8.8%)	Jimmy Carter	Ronald Reagan	R+12.7(Δ R+11.7)	R+9.7(Δ R+11.8)	R+3.0(Δ D+0.1)	1,317,661(Δ 38,355)	Wikipedia	8
1984	605,620(46.2%)(Δ 96,948)	703,088(53.6%)(Δ 27,062)	(45.9%, 53.3%, 0.1%)	Walter Mondale	Ronald Reagan	R+7.4(Δ D+5.3)	R+18.2(Δ R+8.5)	D+10.8(Δ D+13.8)	1,319,805(Δ 2,144)	Wikipedia	8
1988	670,557(55.0%)(Δ 64,937)	545,355(44.8%)(Δ -157,733)	(54.7%, 44.5%, 0.2%)	Michael Dukakis	George H.W. Bush	D+10.2(Δ D+17.6)	R+7.7(Δ D+10.5)	D+17.9(Δ D+7.1)	1,225,614(Δ -94,191)	Wikipedia	8
1992	586,353(43.6%)(Δ -84,204)	504,891(37.5%)(Δ -40,464)	(43.3%, 37.3%, 18.7%)	Bill Clinton	George H.W. Bush	D+6.0(Δ R+4.2)	D+5.6(Δ D+13.3)	D+0.5(Δ R+17.5)	1,354,607(Δ 128,993)	Wikipedia	7
1996	620,258(50.9%)(Δ 33,905)	492,644(40.4%)(Δ -12,247)	(50.3%, 39.9%, 8.5%)	Bill Clinton	Bob Dole	D+10.3(Δ D+4.3)	D+8.5(Δ D+3.0)	D+1.8(Δ D+1.4)	1,234,075(Δ -120,532)	Wikipedia	7
2000	638,517(49.0%)(Δ 18,259)	634,373(48.7%)(Δ 141,729)	(48.5%, 48.2%, 2.2%)	Al Gore	George W. Bush	D+0.3(Δ R+10.0)	D+0.5(Δ R+8.0)	R+0.2(Δ R+2.0)	1,315,563(Δ 81,488)	Wikipedia	7
2004	741,898(49.5%)(Δ 103,381)	751,957(50.1%)(Δ 117,584)	(49.2%, 49.9%, 0.4%)	John Kerry	George W. Bush	R+0.7(Δ R+1.0)	R+2.5(Δ R+3.0)	D+1.8(Δ D+2.0)	1,506,908(Δ 191,345)	Wikipedia	7
2008	828,940(54.6%)(Δ 87,042)	682,379(44.9%)(Δ -69,578)	(53.9%, 44.4%, 0.5%)	Barack Obama	John McCain	D+9.5(Δ D+10.2)	D+7.3(Δ D+9.7)	D+2.3(Δ D+0.5)	1,537,123(Δ 30,215)	Wikipedia	7
2012	822,544(52.5%)(Δ -6,396)	730,617(46.7%)(Δ 48,238)	(52.0%, 46.2%, 0.8%)	Barack Obama	Mitt Romney	D+5.8(Δ R+3.7)	D+3.9(Δ R+3.4)	D+2.0(Δ R+0.3)	1,582,180(Δ 45,057)	Wikipedia	6
2016	653,669(43.2%)(Δ -168,875)	800,983(52.9%)(Δ 70,366)	(41.7%, 51.1%, 3.8%)	Hillary Clinton	Donald Trump	R+9.4(Δ R+15.2)	D+2.1(Δ R+1.8)	R+11.5(Δ R+13.5)	1,566,031(Δ -16,149)	Wikipedia	6
2020	759,061(45.3%)(Δ 105,392)	897,672(53.5%)(Δ 96,689)	(44.9%, 53.1%, 1.2%)	Joe Biden	Donald Trump	R+8.2(Δ D+1.2)	D+4.5(Δ D+2.4)	R+12.7(Δ R+1.1)	1,690,871(Δ 124,840)	Wikipedia	6
2024	707,278(42.9%)(Δ -51,783)	927,019(56.3%)(Δ 29,347)	(42.5%, 55.7%, 0.8%)	Kamala Harris	Donald Trump	R+13.2(Δ R+5.0)	R+1.5(Δ R+5.9)	R+11.7(Δ D+0.9)	1,663,506(Δ -27,365)	Wikipedia	6

Column explanations

Δ: Change (delta) in the value from the previous election year.
Year: Election year.
D: Number of votes for the Democratic candidate (raw count(pct%)).
R: Number of votes for the Republican candidate (raw count(pct%)).
Margin (D%, R%, 3rd%): Vote share breakdown showing Democratic %, Republican %, and top third-party % in format (D%, R%, 3rd%).
D Cand.: Name of the Democratic candidate.
R Cand.: Name of the Republican candidate.
State Margin: Margin between the two major-party candidates, including third-party votes ((D - R)/total).
Nat. Margin: The national presidential margin for that year, including third-party votes ((D_total - R_total)/total_votes).
Rel. Margin: The presidential margin relative to the national presidential margin (Margin - Nat. Margin).
Total votes: Total voter turnout or ballots cast (when provided).
Source: URL of the source for this data (usually Wikipedia).
EVs: Number of electoral votes allocated to this state or unit.

Iowa (IA) — Third-Party Data

Year	D	R	Margin (D%, R%, 3rd%)	Other votes	Top 3rd-Party Candidate	Top 3rd-Party Share	Total 3rd-Party Votes	State 3rd-Party Share	3rd-Party Nat. Share	3rd-Party Rel. Share
1864	49,525(35.9%)	88,500(64.1%)	(35.9%, 64.1%, 0.0%)	0(0.0%)	None	0.00%	0	0.00%	0.02%	-0.02%
1868	74,040(38.1%)(Δ 24,515)	120,399(61.9%)(Δ 31,899)	(38.1%, 61.9%, 0.0%)	0(0.0%)	None	0.00%	0	0.00%	0.00%	0.00%
1872	81,636(37.9%)(Δ 7,596)	131,566(61.1%)(Δ 11,167)	(37.7%, 60.8%, 1.0%)	2,221(1.0%)	Charles O'Conor	1.03%	3,163	1.46%	0.63%	0.83%
1876	112,121(38.3%)(Δ 30,485)	171,326(58.5%)(Δ 39,760)	(38.3%, 58.5%, 3.2%)	9,431(3.2%)	Peter Cooper	3.22%	9,431	3.22%	1.16%	2.06%
1880	105,845(32.8%)(Δ -6,276)	183,927(57.0%)(Δ 12,601)	(32.7%, 56.9%, 10.1%)	32,701(10.1%)	James Weaver	10.11%	33,726	10.43%	3.47%	6.95%
1884	177,316(47.2%)(Δ 71,471)	197,089(52.4%)(Δ 13,162)	(47.0%, 52.3%, 0.4%)	1,499(0.4%)	John St. John	0.40%	2,796	0.74%	2.87%	-2.13%
1888	179,877(44.9%)(Δ 2,561)	211,603(52.8%)(Δ 14,514)	(44.5%, 52.4%, 2.3%)	9,105(2.3%)	Alson Streeter	2.25%	12,655	3.13%	3.57%	-0.44%
1892	196,367(45.0%)(Δ 16,490)	219,795(50.3%)(Δ 8,192)	(44.3%, 49.6%, 4.6%)	20,595(4.7%)	James Weaver	4.65%	26,997	6.09%	10.97%	-4.87%
1896	223,741(43.2%)(Δ 27,374)	289,293(55.9%)(Δ 69,498)	(42.9%, 55.5%, 0.9%)	4,516(0.9%)	John Palmer	0.87%	8,513	1.63%	2.27%	-0.63%
1900	209,265(39.7%)(Δ -14,476)	307,808(58.5%)(Δ 18,515)	(39.5%, 58.0%, 1.8%)	9,502(1.8%)	John Woolley	1.79%	13,282	2.50%	2.84%	-0.34%
1904	149,276(31.6%)(Δ -59,989)	308,158(65.2%)(Δ 350)	(30.7%, 63.4%, 3.1%)	14,849(3.1%)	Eugene V. Debs	3.05%	28,659	5.90%	5.99%	-0.10%
1908	200,771(41.3%)(Δ 51,495)	275,209(56.6%)(Δ -32,949)	(40.6%, 55.6%, 2.0%)	9,837(2.0%)	Eugene Chafin	1.99%	18,789	3.80%	5.39%	-1.59%
1912	185,325(39.7%)(Δ -15,446)	161,819(34.7%)(Δ -113,390)	(37.6%, 32.9%, 24.3%)	119,805(25.7%)	William H. Taft	24.33%	145,212	29.49%	30.74%	-1.25%
1916	218,699(42.9%)(Δ 33,374)	280,439(55.0%)(Δ 118,620)	(42.6%, 54.6%, 2.1%)	10,973(2.2%)	Allan Benson	2.14%	14,804	2.88%	4.64%	-1.76%
1920	227,921(25.9%)(Δ 9,222)	634,674(72.2%)(Δ 354,235)	(25.5%, 70.9%, 1.9%)	16,981(1.9%)	Eugene Debs	1.90%	32,487	3.63%	5.53%	-1.91%
1924	162,600(16.7%)(Δ -65,321)	537,635(55.3%)(Δ -97,039)	(16.6%, 55.0%, 27.9%)	272,243(28.0%)	Robert La Follette	27.87%	276,725	28.33%	17.14%	11.19%
1928	379,311(37.7%)(Δ 216,711)	623,570(62.0%)(Δ 85,935)	(37.6%, 61.8%, 0.3%)	2,960(0.3%)	Norman Thomas	0.29%	6,608	0.65%	0.99%	-0.34%
1932	598,019(57.9%)(Δ 218,708)	414,433(40.1%)(Δ -209,137)	(57.7%, 40.0%, 2.0%)	20,467(2.0%)	Thomas/Maurer	1.97%	24,235	2.34%	2.94%	-0.60%
1936	621,756(54.6%)(Δ 23,737)	487,977(42.8%)(Δ 73,544)	(54.4%, 42.7%, 2.6%)	29,687(2.6%)	William Lemke	2.60%	33,000	2.89%	2.66%	0.23%
1940	578,800(47.8%)(Δ -42,956)	632,370(52.2%)(Δ 144,393)	(47.6%, 52.0%, 0.0%)	0(0.0%)	None	0.00%	4,260	0.35%	0.48%	-0.13%
1944	499,876(47.7%)(Δ -78,924)	547,267(52.2%)(Δ -85,103)	(47.5%, 52.0%, 0.1%)	1,511(0.1%)	Norman Thomas	0.14%	5,456	0.52%	0.72%	-0.20%
1948	522,380(50.8%)(Δ 22,504)	494,018(48.0%)(Δ -53,249)	(50.3%, 47.6%, 1.2%)	12,125(1.2%)	Henry Wallace	1.17%	21,866	2.11%	5.38%	-3.27%
1952	451,513(35.7%)(Δ -70,867)	808,906(63.9%)(Δ 314,888)	(35.6%, 63.8%, 0.4%)	5,085(0.4%)	Vincent Hallinan	0.40%	8,354	0.66%	0.49%	0.17%
1956	501,858(40.7%)(Δ 50,345)	729,187(59.1%)(Δ -79,719)	(40.7%, 59.1%, 0.3%)	3,202(0.3%)	Unpledged Electors	0.26%	3,519	0.29%	0.67%	-0.38%
1960	550,565(43.2%)(Δ 48,707)	722,381(56.7%)(Δ -6,806)	(43.2%, 56.7%, 0.0%)	230(0.0%)	Eric Hass	0.02%	864	0.07%	0.73%	-0.66%
1964	733,030(62.0%)(Δ 182,465)	449,148(38.0%)(Δ -273,233)	(61.9%, 37.9%, 0.0%)	0(0.0%)	None	0.00%	2,361	0.20%	0.48%	-0.28%
1968	476,699(41.0%)(Δ -256,331)	619,106(53.3%)(Δ 169,958)	(40.8%, 53.0%, 5.7%)	66,422(5.7%)	George Wallace	5.69%	72,126	6.18%	13.86%	-7.68%
1972	496,206(40.5%)(Δ 19,507)	706,207(57.7%)(Δ 87,101)	(40.5%, 57.6%, 1.8%)	22,056(1.8%)	John Schmitz	1.80%	23,531	1.92%	1.80%	0.12%
1976	619,931(48.7%)(Δ 123,725)	632,863(49.7%)(Δ -73,344)	(48.5%, 49.5%, 1.6%)	20,051(1.6%)	Eugene McCarthy	1.57%	26,512	2.07%	1.90%	0.17%
1980	508,672(39.1%)(Δ -111,259)	676,026(52.0%)(Δ 43,163)	(38.6%, 51.3%, 8.8%)	115,633(8.9%)	John Anderson	8.78%	132,963	10.09%	8.24%	1.85%
1984	605,620(46.2%)(Δ 96,948)	703,088(53.6%)(Δ 27,062)	(45.9%, 53.3%, 0.1%)	1,844(0.1%)	David Bergland	0.14%	11,097	0.84%	0.67%	0.17%
1988	670,557(55.0%)(Δ 64,937)	545,355(44.8%)(Δ -157,733)	(54.7%, 44.5%, 0.2%)	2,494(0.2%)	Ron Paul	0.20%	9,702	0.79%	0.98%	-0.19%
1992	586,353(43.6%)(Δ -84,204)	504,891(37.5%)(Δ -40,464)	(43.3%, 37.3%, 18.7%)	253,468(18.8%)	Ross Perot	18.71%	263,363	19.44%	19.55%	-0.10%
1996	620,258(50.9%)(Δ 33,905)	492,644(40.4%)(Δ -12,247)	(50.3%, 39.9%, 8.5%)	105,159(8.6%)	Ross Perot	8.52%	121,173	9.82%	10.05%	-0.23%
2000	638,517(49.0%)(Δ 18,259)	634,373(48.7%)(Δ 141,729)	(48.5%, 48.2%, 2.2%)	29,374(2.3%)	Ralph Nader	2.23%	42,673	3.24%	3.75%	-0.50%
2004	741,898(49.5%)(Δ 103,381)	751,957(50.1%)(Δ 117,584)	(49.2%, 49.9%, 0.4%)	5,973(0.4%)	Ralph Nader	0.40%	13,053	0.87%	1.00%	-0.13%
2008	828,940(54.6%)(Δ 87,042)	682,379(44.9%)(Δ -69,578)	(53.9%, 44.4%, 0.5%)	8,014(0.5%)	Ralph Nader	0.52%	25,804	1.68%	1.42%	0.26%
2012	822,544(52.5%)(Δ -6,396)	730,617(46.7%)(Δ 48,238)	(52.0%, 46.2%, 0.8%)	12,926(0.8%)	Johnson/Gray	0.82%	29,019	1.83%	1.73%	0.10%
2016	653,669(43.2%)(Δ -168,875)	800,983(52.9%)(Δ 70,366)	(41.7%, 51.1%, 3.8%)	59,186(3.9%)	Johnson/Weld	3.78%	111,379	7.11%	5.73%	1.38%
2020	759,061(45.3%)(Δ 105,392)	897,672(53.5%)(Δ 96,689)	(44.9%, 53.1%, 1.2%)	19,637(1.2%)	Jorgensen/Cohen	1.16%	34,138	2.02%	1.84%	0.17%
2024	707,278(42.9%)(Δ -51,783)	927,019(56.3%)(Δ 29,347)	(42.5%, 55.7%, 0.8%)	13,122(0.8%)	Kennedy/Shanahan	0.79%	29,209	1.76%	1.88%	-0.12%

Column explanations

Δ: Change (delta) in the value from the previous election year.
Year: Election year.
D: Number of votes for the Democratic candidate (raw count(pct%)).
R: Number of votes for the Republican candidate (raw count(pct%)).
Margin (D%, R%, 3rd%): Vote share breakdown showing Democratic %, Republican %, and top third-party % in format (D%, R%, 3rd%).
Other votes: Number of votes for third-party (other) candidates (raw count(pct%)).
Top 3rd-Party Candidate: Name of the highest-vote third-party / other candidate in that state and year.
Top 3rd-Party Share: Share of the vote received by third-party (other) candidates.
Total 3rd-Party Votes: Total votes for all third-party / other candidates combined (may exceed top candidate).
State 3rd-Party Share: Share of the vote received by third-party (other) candidates.
3rd-Party Nat. Share: The national third-party share for that year (3rd-Party votes / total votes).
3rd-Party Rel. Share: Third-party share relative to the national third-party share (3rd-Party share - Nat. 3rd-Party share).

Iowa (IA) — Two-Party Data

Year	D	R	Margin (D%, R%, 3rd%)	2-Party Margin	2-Party Nat. Margin	2-Party Rel. Margin	EVs
1864	49,525(35.9%)	88,500(64.1%)	(35.9%, 64.1%, 0.0%)	R+28.2	R+10.1	R+18.2	8
1868	74,040(38.1%)(Δ 24,515)	120,399(61.9%)(Δ 31,899)	(38.1%, 61.9%, 0.0%)	R+23.8(Δ D+4.4)	R+5.3(Δ D+4.8)	R+18.5(Δ R+0.4)	8
1872	81,636(38.3%)(Δ 7,596)	131,566(61.7%)(Δ 11,167)	(37.7%, 60.8%, 1.0%)	R+23.4(Δ D+0.4)	R+11.9(Δ R+6.5)	R+11.5(Δ D+7.0)	11
1876	112,121(39.6%)(Δ 30,485)	171,326(60.4%)(Δ 39,760)	(38.3%, 58.5%, 3.2%)	R+20.9(Δ D+2.5)	D+3.0(Δ D+14.9)	R+23.9(Δ R+12.4)	11
1880	105,845(36.5%)(Δ -6,276)	183,927(63.5%)(Δ 12,601)	(32.7%, 56.9%, 10.1%)	R+26.9(Δ R+6.1)	R+0.1(Δ R+3.1)	R+26.8(Δ R+2.9)	11
1884	177,316(47.4%)(Δ 71,471)	197,089(52.6%)(Δ 13,162)	(47.0%, 52.3%, 0.4%)	R+5.3(Δ D+21.7)	D+0.6(Δ D+0.7)	R+5.9(Δ D+21.0)	13
1888	179,877(45.9%)(Δ 2,561)	211,603(54.1%)(Δ 14,514)	(44.5%, 52.4%, 2.3%)	R+8.1(Δ R+2.8)	D+0.9(Δ D+0.3)	R+9.0(Δ R+3.1)	13
1892	196,367(47.2%)(Δ 16,490)	219,795(52.8%)(Δ 8,192)	(44.3%, 49.6%, 4.6%)	R+5.6(Δ D+2.5)	D+3.4(Δ D+2.5)	R+9.0(Δ R+0.0)	13
1896	223,741(43.6%)(Δ 27,374)	289,293(56.4%)(Δ 69,498)	(42.9%, 55.5%, 0.9%)	R+12.8(Δ R+7.1)	R+4.4(Δ R+7.8)	R+8.4(Δ D+0.6)	13
1900	209,265(40.5%)(Δ -14,476)	307,808(59.5%)(Δ 18,515)	(39.5%, 58.0%, 1.8%)	R+19.1(Δ R+6.3)	R+6.3(Δ R+1.9)	R+12.7(Δ R+4.4)	13
1904	149,276(32.6%)(Δ -59,989)	308,158(67.4%)(Δ 350)	(30.7%, 63.4%, 3.1%)	R+34.7(Δ R+15.7)	R+20.0(Δ R+13.7)	R+14.7(Δ R+2.0)	13
1908	200,771(42.2%)(Δ 51,495)	275,209(57.8%)(Δ -32,949)	(40.6%, 55.6%, 2.0%)	R+15.6(Δ D+19.1)	R+9.0(Δ D+11.0)	R+6.6(Δ D+8.1)	13
1912	185,325(53.4%)(Δ -15,446)	161,819(46.6%)(Δ -113,390)	(37.6%, 32.9%, 24.3%)	D+6.8(Δ D+22.4)	D+20.9(Δ D+29.9)	R+14.1(Δ R+7.5)	13
1916	218,699(43.8%)(Δ 33,374)	280,439(56.2%)(Δ 118,620)	(42.6%, 54.6%, 2.1%)	R+12.4(Δ R+19.1)	D+3.3(Δ R+17.6)	R+15.6(Δ R+1.5)	13
1920	227,921(26.4%)(Δ 9,222)	634,674(73.6%)(Δ 354,235)	(25.5%, 70.9%, 1.9%)	R+47.2(Δ R+34.8)	R+27.7(Δ R+31.0)	R+19.5(Δ R+3.8)	13
1924	162,600(23.2%)(Δ -65,321)	537,635(76.8%)(Δ -97,039)	(16.6%, 55.0%, 27.9%)	R+53.6(Δ R+6.4)	R+30.4(Δ R+2.7)	R+23.1(Δ R+3.7)	13
1928	379,311(37.8%)(Δ 216,711)	623,570(62.2%)(Δ 85,935)	(37.6%, 61.8%, 0.3%)	R+24.4(Δ D+29.2)	R+17.6(Δ D+12.8)	R+6.8(Δ D+16.4)	13
1932	598,019(59.1%)(Δ 218,708)	414,433(40.9%)(Δ -209,137)	(57.7%, 40.0%, 2.0%)	D+18.1(Δ D+42.5)	D+18.3(Δ D+35.9)	R+0.2(Δ D+6.6)	11
1936	621,756(56.0%)(Δ 23,737)	487,977(44.0%)(Δ 73,544)	(54.4%, 42.7%, 2.6%)	D+12.1(Δ R+6.1)	D+24.9(Δ D+6.6)	R+12.9(Δ R+12.7)	11
1940	578,800(47.8%)(Δ -42,956)	632,370(52.2%)(Δ 144,393)	(47.6%, 52.0%, 0.0%)	R+4.4(Δ R+16.5)	D+10.0(Δ R+14.9)	R+14.4(Δ R+1.6)	11
1944	499,876(47.7%)(Δ -78,924)	547,267(52.3%)(Δ -85,103)	(47.5%, 52.0%, 0.1%)	R+4.5(Δ R+0.1)	D+7.5(Δ R+2.5)	R+12.1(Δ D+2.3)	10
1948	522,380(51.4%)(Δ 22,504)	494,018(48.6%)(Δ -53,249)	(50.3%, 47.6%, 1.2%)	D+2.8(Δ D+7.3)	D+4.7(Δ R+2.8)	R+1.9(Δ D+10.1)	10
1952	451,513(35.8%)(Δ -70,867)	808,906(64.2%)(Δ 314,888)	(35.6%, 63.8%, 0.4%)	R+28.4(Δ R+31.1)	R+10.9(Δ R+15.6)	R+17.5(Δ R+15.5)	10
1956	501,858(40.8%)(Δ 50,345)	729,187(59.2%)(Δ -79,719)	(40.7%, 59.1%, 0.3%)	R+18.5(Δ D+9.9)	R+15.5(Δ R+4.6)	R+3.0(Δ D+14.5)	10
1960	550,565(43.3%)(Δ 48,707)	722,381(56.7%)(Δ -6,806)	(43.2%, 56.7%, 0.0%)	R+13.5(Δ D+5.0)	D+0.2(Δ D+15.7)	R+13.7(Δ R+10.7)	10
1964	733,030(62.0%)(Δ 182,465)	449,148(38.0%)(Δ -273,233)	(61.9%, 37.9%, 0.0%)	D+24.0(Δ D+37.5)	D+22.7(Δ D+22.5)	D+1.3(Δ D+15.0)	9
1968	476,699(43.5%)(Δ -256,331)	619,106(56.5%)(Δ 169,958)	(40.8%, 53.0%, 5.7%)	R+13.0(Δ R+37.0)	R+0.8(Δ R+23.5)	R+12.2(Δ R+13.5)	9
1972	496,206(41.3%)(Δ 19,507)	706,207(58.7%)(Δ 87,101)	(40.5%, 57.6%, 1.8%)	R+17.5(Δ R+4.5)	R+23.6(Δ R+22.8)	D+6.1(Δ D+18.3)	8
1976	619,931(49.5%)(Δ 123,725)	632,863(50.5%)(Δ -73,344)	(48.5%, 49.5%, 1.6%)	R+1.0(Δ D+16.4)	D+2.1(Δ D+25.7)	R+3.1(Δ R+9.2)	8
1980	508,672(42.9%)(Δ -111,259)	676,026(57.1%)(Δ 43,163)	(38.6%, 51.3%, 8.8%)	R+14.1(Δ R+13.1)	R+10.6(Δ R+12.7)	R+3.5(Δ R+0.4)	8
1984	605,620(46.3%)(Δ 96,948)	703,088(53.7%)(Δ 27,062)	(45.9%, 53.3%, 0.1%)	R+7.4(Δ D+6.7)	R+18.3(Δ R+7.7)	D+10.9(Δ D+14.4)	8
1988	670,557(55.1%)(Δ 64,937)	545,355(44.9%)(Δ -157,733)	(54.7%, 44.5%, 0.2%)	D+10.3(Δ D+17.7)	R+7.8(Δ D+10.5)	D+18.1(Δ D+7.2)	8
1992	586,353(53.7%)(Δ -84,204)	504,891(46.3%)(Δ -40,464)	(43.3%, 37.3%, 18.7%)	D+7.5(Δ R+2.8)	D+6.9(Δ D+14.7)	D+0.6(Δ R+17.5)	7
1996	620,258(55.7%)(Δ 33,905)	492,644(44.3%)(Δ -12,247)	(50.3%, 39.9%, 8.5%)	D+11.5(Δ D+4.0)	D+9.5(Δ D+2.6)	D+2.0(Δ D+1.4)	7
2000	638,517(50.2%)(Δ 18,259)	634,373(49.8%)(Δ 141,729)	(48.5%, 48.2%, 2.2%)	D+0.3(Δ R+11.1)	D+0.5(Δ R+8.9)	R+0.2(Δ R+2.2)	7
2004	741,898(49.7%)(Δ 103,381)	751,957(50.3%)(Δ 117,584)	(49.2%, 49.9%, 0.4%)	R+0.7(Δ R+1.0)	R+2.5(Δ R+3.0)	D+1.8(Δ D+2.0)	7
2008	828,940(54.8%)(Δ 87,042)	682,379(45.2%)(Δ -69,578)	(53.9%, 44.4%, 0.5%)	D+9.7(Δ D+10.4)	D+7.4(Δ D+9.9)	D+2.3(Δ D+0.5)	7
2012	822,544(53.0%)(Δ -6,396)	730,617(47.0%)(Δ 48,238)	(52.0%, 46.2%, 0.8%)	D+5.9(Δ R+3.8)	D+3.9(Δ R+3.4)	D+2.0(Δ R+0.3)	6
2016	653,669(44.9%)(Δ -168,875)	800,983(55.1%)(Δ 70,366)	(41.7%, 51.1%, 3.8%)	R+10.1(Δ R+16.0)	D+2.2(Δ R+1.7)	R+12.4(Δ R+14.3)	6
2020	759,061(45.8%)(Δ 105,392)	897,672(54.2%)(Δ 96,689)	(44.9%, 53.1%, 1.2%)	R+8.4(Δ D+1.8)	D+4.5(Δ D+2.3)	R+12.9(Δ R+0.6)	6
2024	707,278(43.3%)(Δ -51,783)	927,019(56.7%)(Δ 29,347)	(42.5%, 55.7%, 0.8%)	R+13.4(Δ R+5.1)	R+1.5(Δ R+6.0)	R+11.9(Δ D+1.0)	6

Column explanations

Δ: Change (delta) in the value from the previous election year.
Year: Election year.
D: Number of votes for the Democratic candidate (raw count(pct%)).
R: Number of votes for the Republican candidate (raw count(pct%)).
Margin (D%, R%, 3rd%): Vote share breakdown showing Democratic %, Republican %, and top third-party % in format (D%, R%, 3rd%).
2-Party Margin: Margin between the two major-party candidates, ignoring third-party votes ((D - R)/(D + R)).
2-Party Nat. Margin: The national presidential margin for that year, including third-party votes ((D_total - R_total)/total_votes).
2-Party Rel. Margin: The presidential margin relative to the national presidential margin (Margin - Nat. Margin).
EVs: Number of electoral votes allocated to this state or unit.

Iowa (IA) — Statewide

Interactive Chart

Iowa (IA) — Total Data

Column explanations

Iowa (IA) — Third-Party Data

Column explanations

Iowa (IA) — Two-Party Data

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