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Lyon County, IA


Designated Market Area: Sioux Falls-Mitchell, SD-IA-MN-NE
USDA County Type (2025): Farming
American Communities Project County Type (2023): Rural Middle America

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

 

Tracts in Lyon County, IA

   



Click here to view demographic data for Lyon County, IA

2024 population: 12,378   ( 449 from 2020)
Land area: 587.6 square miles
Population density: 21.1 persons per square mile

2024 Census data
White:11,456 92.55% 1.5%
Black:560.45% 69.7%
Indian:360.29% 71.4%
Asian:1170.95% 74.6%
2+ races:1601.29% 23.1%
Hispanic:5534.47% 41.4%
Total non-White:9227.45% 43.6%

2020-2024 ComponentsNumberRate
Births:646 13.5
Deaths:48210.1
Net Migration: 1853.9
Net Immigration: 1032.2
Change in White population:169 1.4
Change in Non-White pop.:280 2.3



Historical Presidential Election Results for Lyon County, IA

Recent Trends
VotesΔ MarginSwing %
2024 vs. 2020 R +192 R +236 R + 1.9%
D -44
2024 vs. 2016 R +707 R +604 R + 0.5%
D +103
2020 vs. 2016 R +515 R +368 D + 1.4%
D +147
2024 vs. 2012 R +921 R +1,321 R + 14.9%
D -400
2016 vs. 2008 R +721 R +1,476 R + 24.4%
D -755
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 79% Donald Trump (R) 5,899 84.2% Kamala Harris (D) 1,023 14.6% 80 [+] 1.1% 7,002 29 35 0.42%
2020 80% Donald Trump* (R) 5,707 83.2% Joe Biden (D) 1,067 15.5% 89 [+] 1.3% 6,863 30 36 0.41%
2016 75% Donald Trump (R) 5,192 81.4% Hillary Clinton (D) 920 14.4% 265 [+] 4.2% 6,377 30 36 0.41%
2012 77% Mitt Romney (R) 4,978 76.5% Barack Obama* (D) 1,423 21.9% 108 [+] 1.7% 6,509 30 29 0.41%
2008 74% John McCain (R) 4,471 71.9% Barack Obama (D) 1,675 26.9% 74 [+] 1.2% 6,220 27 26 0.40%
2004 72% George W. Bush* (R) 4,751 77.9% John Kerry (D) 1,303 21.4% 47 [+] 0.8% 6,101 28 27 0.40%
2000 63% George W. Bush (R) 3,918 73.3% Albert Gore, Jr. (D) 1,313 24.6% 111 [+] 2.1% 5,342 25 25 0.41%
1996 64% Robert Dole (R) 3,396 63.5% Bill Clinton* (D) 1,489 27.8% 467 [+] 8.7% 5,352 24 23 0.43%
1992 69% George Bush* (R) 3,272 57.1% Bill Clinton (D) 1,331 23.2% 1,123 [+] 19.6% 5,726 20 20 0.42%
1988 62% George Bush (R) 3,517 66.8% Michael Dukakis (D) 1,706 32.4% 41 [+] 0.8% 5,264 22 13 0.43%
1984 65% Ronald Reagan* (R) 4,178 74.1% Walter Mondale (D) 1,401 24.8% 63 1.1% 5,642 21 15 0.43%
1980 70% Ronald Reagan (R) 4,349 70.1% Jimmy Carter* (D) 1,431 23.1% 428 [+] 6.9% 6,208 19 19 0.47%
1976 66% Gerald Ford* (R) 3,558 64.1% Jimmy Carter (D) 1,870 33.7% 126 [+] 2.3% 5,554 15 16 0.43%
1972 61% Richard Nixon* (R) 3,788 72.1% George McGovern (D) 1,407 26.8% 57 [+] 1.1% 5,252 15 11 0.43%
1968 73% Richard Nixon (R) 4,195 72.9% Hubert Humphrey (D) 1,403 24.4% 156 [+] 2.7% 5,754 20 30 0.49%
1964 73% Barry Goldwater (R) 3,185 53.7% Lyndon Johnson* (D) 2,747 46.3% 3 0.1% 5,935 16 15 0.50%
1960 80% Richard Nixon (R) 4,917 73.7% John Kennedy (D) 1,752 26.2% 7 0.1% 6,676 17 24 0.52%
1956 69% Dwight Eisenhower* (R) 4,356 70.8% Adlai Stevenson (D) 1,790 29.1% 4 0.1% 6,150 12 13 0.50%
1952 69% Dwight Eisenhower (R) 4,893 78.6% Adlai Stevenson (D) 1,324 21.3% 9 0.1% 6,226 15 23 0.49%
1948 52% Thomas Dewey (R) 2,500 52.7% Harry Truman* (D) 2,174 45.9% 66 [+] 1.4% 4,740 5 8 0.46%
1944 54% Thomas Dewey (R) 3,065 60.8% Franklin Roosevelt* (D) 1,970 39.1% 7 0.1% 5,042 9 15 0.48%
1940 69% Wendell Willkie (R) 3,880 59.3% Franklin Roosevelt* (D) 2,648 40.5% 12 0.2% 6,540 7 15 0.54%
1936 66% Franklin Roosevelt* (D) 3,590 60.4% Alf Landon (R) 2,264 38.1% 90 [+] 1.5% 5,944 -5 2 0.52%
1932 59% Franklin Roosevelt (D) 3,543 66.9% Herbert Hoover* (R) 1,684 31.8% 70 [+] 1.3% 5,297 -8 -8 0.51%
1928 55% Herbert Hoover (R) 3,170 66.0% Al Smith (D) 1,632 34.0% 0 0.0% 4,802 4 8 0.48%
1924 54% Robert LaFollette (Prog) 2,162 45.8% Calvin Coolidge (R) 2,082 44.1% 481 [+] 10.2% 4,725 -11 -10 0.48%
1920 51% Warren Harding (R) 3,633 81.5% James Cox (D) 729 16.3% 97 [+] 2.2% 4,459 11 21 0.50%
1916 35% Charles Evans Hughes (R) 1,760 59.8% Woodrow Wilson* (D) 1,137 38.6% 47 [+] 1.6% 2,944 6 14 0.57%
1912 34% Theodore Roosevelt (Prog) 1,361 49.0% Woodrow Wilson (D) 896 32.3% 520 [+] 18.7% 2,777 -10 -8 0.56%
1908 37% William Taft (R) 1,650 58.9% William J. Bryan (D) 1,064 38.0% 86 [+] 3.1% 2,800 3 7 0.57%
1904 38% Theodore Roosevelt (R) 1,802 65.1% Alton Parker (D) 841 30.4% 127 [+] 4.6% 2,770 2 9 0.57%
1900 44% William McKinley* (R) 1,666 55.0% William J. Bryan (D) 1,289 42.6% 74 [+] 2.4% 3,029 -3 3 0.57%
* incumbent         PSV: percent of state vote

Historical Statewide Election Results for Lyon 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) 4,277 86.6% Michael Franken (D) 662 13.4% 1 [+] 0.0% 4,940 31 0.41%
2022 G 57% Kim Reynolds* (R) 4,438 88.8% Deidre DeJear (D) 534 10.7% 27 [+] 0.5% 4,999 31 0.41%
2020 S2 79% Joni Ernst* (R) 5,522 81.8% Theresa Greenfield (D) 1,073 15.9% 156 [+] 2.3% 6,751 30 0.40%
2018 G 61% Kim Reynolds* (R) 4,281 82.5% Fred Hubbell (D) 853 16.4% 53 [+] 1.0% 5,187 32 0.39%
2016 S3 74% Charles Grassley* (R) 5,328 85.2% Patty Judge (D) 761 12.2% 165 [+] 2.6% 6,254 25 0.41%
2014 S2 51% Joni Ernst (R) 3,647 84.1% Bruce Braley (D) 588 13.6% 100 [+] 2.3% 4,335 32 0.38%
2014 G 52% Terry Branstad* (R) 3,787 86.8% Jack Hatch (D) 491 11.3% 84 [+] 1.9% 4,362 28 0.39%
2010 S3 60% Charles Grassley* (R) 4,269 85.5% Roxanne Conlin (D) 620 12.4% 106 [+] 2.1% 4,995 21 0.45%
2010 G 60% Terry Branstad (R) 4,054 80.2% Chet Culver* (D) 889 17.6% 111 [+] 2.2% 5,054 27 0.45%
2008 S2 71% Christopher Reed (R) 3,614 60.9% Tom Harkin* (D) 2,318 39.0% 6 [+] 0.1% 5,938 24 0.40%
2006 G 48% Jim Nussle (R) 3,015 75.1% Chet Culver (D) 975 24.3% 27 [+] 0.7% 4,017 31 0.38%
2004 S3 71% Charles Grassley* (R) 5,202 87.1% Art Small (D) 717 12.0% 56 [+] 0.9% 5,975 17 0.40%
2002 S2 50% Greg Ganske (R) 2,933 69.1% Tom Harkin* (D) 1,271 29.9% 41 [+] 1.0% 4,245 25 0.41%
2002 G 50% Doug Gross (R) 3,112 73.0% Tom Vilsack* (D) 1,103 25.9% 49 [+] 1.1% 4,264 28 0.42%
1998 S3 46% Charles Grassley* (R) 3,313 85.0% David Osterberg (D) 554 14.2% 29 [+] 0.7% 3,896 17 0.41%
1998 G 47% Jim Ross Lightfoot (R) 2,946 74.9% Tom Vilsack (D) 952 24.2% 37 [+] 0.9% 3,935 28 0.41%
1996 S2 61% Jim Ross Lightfoot (R) 3,669 72.0% Tom Harkin* (D) 1,370 26.9% 58 [+] 1.1% 5,097 25 0.42%
1994 G 46% Terry Branstad* (R) 2,927 76.6% Bonnie Campbell (D) 869 22.7% 26 [+] 0.7% 3,822 20 0.38%
1992 S3 60% Charles Grassley* (R) 4,195 83.9% Jean Lloyd-Jones (D) 710 14.2% 94 [+] 1.9% 4,999 14 0.39%
1990 S2 49% Tom Tauke (R) 2,846 70.3% Tom Harkin* (D) 1,204 29.7% 0 0.0% 4,050 24 0.41%
1990 G 48% Terry Branstad* (R) 3,130 77.6% Donald Avenson (D) 891 22.1% 10 [+] 0.2% 4,031 17 0.41%
1986 S3 43% Charles Grassley* (R) 2,946 79.3% John Roehrick (D) 758 20.4% 11 [+] 0.3% 3,715 13 0.42%
1986 G 45% Terry Branstad* (R) 2,683 70.2% Lowell Junkins (D) 1,138 29.8% 0 0.0% 3,821 18 0.42%
1984 S2 63% Roger Jepsen* (R) 3,784 69.4% Tom Harkin (D) 1,634 30.0% 31 [+] 0.6% 5,449 26 0.42%
1982 G 43% Terry Branstad (R) 2,897 76.2% Roxanne Conlin (D) 897 23.6% 9 [+] 0.2% 3,803 23 0.37%
1980 S3 66% Charles Grassley (R) 4,303 73.7% John Culver* (D) 1,487 25.5% 45 [+] 0.8% 5,835 20 0.46%
1978 S2 41% Roger Jepsen (R) 2,345 67.8% Dick Clark* (D) 1,085 31.4% 28 [+] 0.8% 3,458 17 0.42%
1978 G 42% Robert Ray* (R) 2,561 71.9% Jerry Fitzgerald (D) 978 27.5% 21 [+] 0.6% 3,560 14 0.42%
1974 S3 48% David Stanley (R) 2,531 62.5% John Culver (D) 1,490 36.8% 28 [+] 0.7% 4,049 15 0.46%
1974 G 51% Robert Ray* (R) 2,996 69.4% James Schaben (D) 1,271 29.4% 52 [+] 1.2% 4,319 11 0.47%
1972 S2 60% Jack Miller* (R) 3,464 67.5% Dick Clark (D) 1,649 32.1% 22 [+] 0.4% 5,135 23 0.43%
1972 G 61% Robert Ray* (R) 3,750 72.5% Paul Franzenburg (D) 1,393 26.9% 28 [+] 0.5% 5,171 14 0.43%
1970 G 40% Robert Ray* (R) 2,065 65.0% Robert Fulton (D) 1,075 33.8% 38 [+] 1.2% 3,178 14 0.40%
1968 S3 72% David Stanley (R) 3,828 68.0% Harold Hughes (D) 1,797 31.9% 3 [+] 0.1% 5,628 18 0.49%
1968 G 71% Robert Ray (R) 3,945 71.1% Paul Franzenburg (D) 1,603 28.9% 1 [+] 0.0% 5,549 17 0.49%
1966 S2 53% Jack Miller* (R) 3,128 73.7% E.B. Smith (D) 1,107 26.1% 12 [+] 0.3% 4,247 13 0.50%
1966 G 54% William Murray (R) 2,628 61.2% Harold Hughes* (D) 1,658 38.6% 8 [+] 0.2% 4,294 17 0.48%
1964 G 70% Evan Hultman (R) 2,908 51.5% Harold Hughes* (D) 2,734 48.4% 7 [+] 0.1% 5,649 20 0.48%
1962 S3 42% Bourke Hickenlooper* (R) 2,411 70.3% E.B. Smith (D) 1,018 29.7% 0 0.0% 3,429 17 0.42%
1962 G 42% Norman Erbe* (R) 2,339 68.3% Harold Hughes (D) 1,085 31.7% 0 0.0% 3,424 21 0.42%
1960 S2 77% Jack Miller (R) 4,306 67.4% Herschel Loveless (D) 2,087 32.6% 0 0.0% 6,393 15 0.52%
1960 G 76% Norman Erbe (R) 4,474 70.5% Edward McManus (D) 1,870 29.5% 0 0.0% 6,344 18 0.51%
*: 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 Lyon County, IA

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

DateDistrictWinnerRunner-Up OtherTotal Votes
2024-11-05 IA04Randy Feenstra* (R) 5,790 86.3% Ryan Melton (D) 898 13.4% 25 0.4% 6,713
County Total for 2024-11-05:   6,713
2022-11-08 IA04Randy Feenstra* (R) 4,368 88.5% Ryan Melton (D) 523 10.6% 46 0.9% 4,937
County Total for 2022-11-08:   4,937
2020-11-03 IA04Randy Feenstra (R) 5,556 82.9% J.D. Scholten (D) 1,138 17.0% 7 0.1% 6,701
County Total for 2020-11-03:   6,701
2018-11-06 IA04Steve King* (R) 3,716 71.8% J.D. Scholten (D) 1,355 26.2% 101 2.0% 5,172
County Total for 2018-11-06:   5,172
2016-11-08 IA04Steve King* (R) 5,066 82.0% Kim Weaver (D) 1,099 17.8% 10 0.2% 6,175
County Total for 2016-11-08:   6,175
2014-11-04 IA04Steve King* (R) 3,642 83.9% Jim Mowrer (D) 696 16.0% 4 0.1% 4,342
County Total for 2014-11-04:   4,342
2012-11-06 IA04Steve King* (R) 4,783 75.9% Christie Vilsack (D) 1,416 22.5% 105 1.7% 6,304
County Total for 2012-11-06:   6,304
2010-11-02 IA05Steve King* (R) 4,024 81.9% Matthew Campbell (D) 821 16.7% 68 1.4% 4,913
County Total for 2010-11-02:   4,913
2008-11-04 IA05Steve King* (R) 4,366 74.5% Rob Hubler (D) 1,373 23.4% 125 2.1% 5,864
County Total for 2008-11-04:   5,864
2006-11-07 IA05Steve King* (R) 2,986 76.1% Joyce Schulte (D) 814 20.7% 125 3.2% 3,925
County Total for 2006-11-07:   3,925
2004-11-02 IA05Steve King* (R) 4,708 81.1% Joyce Schulte (D) 1,094 18.9% 0 0.0% 5,802
County Total for 2004-11-02:   5,802
2002-11-05 IA05Steve King (R) 3,321 80.6% Paul Shomshor (D) 798 19.4% 0 0.0% 4,119
County Total for 2002-11-05:   4,119
2000-11-07 IA05Tom Latham* (R) 4,193 82.2% Mike Palecek (D) 825 16.2% 85 1.7% 5,103
County Total for 2000-11-07:   5,103
1998-11-03 IA05Tom Latham* (R) 3,349 99.7% 9 0.3% 3,358
County Total for 1998-11-03:   3,358
1996-11-05 IA05Tom Latham* (R) 3,821 81.6% MacDonald Smith (D) 841 18.0% 21 0.4% 4,683
County Total for 1996-11-05:   4,683
1994-11-08 IA05Tom Latham (R) 2,779 78.9% Sheila McGuire (D) 745 21.1% 0 0.0% 3,524
County Total for 1994-11-08:   3,524
1992-11-03 IA05Fred Grandy* (R) 4,520 100.0% 1 0.0% 4,521
County Total for 1992-11-03:   4,521
*: incumbent           sp: special election           RO: runoff election

Voter Registration Data for Lyon County, IA

YearTotalRepublicanDemocratOtherR/D EdgeR/D Edge %VAPOP %
2024 7,206 5,811 80.6% 527 7.3% 868 12.0% Rep +5,284 Rep +73.3% 82%
2022 7,749 5,982 77.2% 699 9.0% 1,068 13.8% Rep +5,283 Rep +68.2% 88%
2020 8,320 6,272 75.4% 816 9.8% 1,232 14.8% Rep +5,456 Rep +65.6% 94%
2018 8,038 5,704 71.0% 777 9.7% 1,557 19.4% Rep +4,927 Rep +61.3% 92%
2016 8,048 5,478 68.1% 878 10.9% 1,692 21.0% Rep +4,600 Rep +57.2% 93%
2014 7,911 5,386 68.1% 849 10.7% 1,676 21.2% Rep +4,537 Rep +57.4% 93%
2012 8,043 5,425 67.4% 907 11.3% 1,711 21.3% Rep +4,518 Rep +56.2% 95%
2010 8,252 5,150 62.4% 1,131 13.7% 1,971 23.9% Rep +4,019 Rep +48.7% 99%
2008 8,338 5,118 61.4% 1,208 14.5% 2,012 24.1% Rep +3,910 Rep +46.9% 99%
2006 8,103 5,054 62.4% 1,094 13.5% 1,955 24.1% Rep +3,960 Rep +48.9% 96%
2004 7,997 4,994 62.4% 1,107 13.8% 1,896 23.7% Rep +3,887 Rep +48.6% 95%
2002 7,668 4,939 64.4% 1,051 13.7% 1,678 21.9% Rep +3,888 Rep +50.7% 91%
2000 7,916 4,992 63.1% 1,171 14.8% 1,753 22.1% Rep +3,821 Rep +48.3% 94%
1994 7,227 4,799 66.4% 1,190 16.5% 1,238 17.1% Rep +3,609 Rep +49.9% 86%
1986 7,086 4,755 67.1% 1,121 15.8% 1,210 17.1% Rep +3,634 Rep +51.3% 83%
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.