| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 179 | 993 | 1,208 | |
| 2020 | R | 220 | 1,065 | 1,319 | |
| 2016 | R | 201 | 993 | 1,293 | |
| 2012 | R | 398 | 851 | 1,278 | |
| 2008 | R | 505 | 799 | 1,346 | |
| 2004 | R | 497 | 953 | 1,469 | |
| 2000 | R | 443 | 820 | 1,332 | |
| 1996 | R | 562 | 576 | 1,354 | |
| 1992 | R | 580 | 655 | 1,670 | |
| 1988 | R | 837 | 893 | 1,750 | |
| 1984 | R | 592 | 1,163 | 1,774 | |
| 1980 | R | 570 | 1,154 | 1,842 | |
| 1976 | D | 1,008 | 812 | 1,846 | |
| 1972 | R | 702 | 1,121 | 1,835 | |
| 1968 | D | 880 | 851 | 1,816 | |
| 1964 | D | 1,356 | 640 | 1,997 | |
| 1960 | D | 1,217 | 1,012 | 2,230 | |
| 1956 | R | 1,025 | 1,035 | 2,061 | |
| 1952 | R | 767 | 1,571 | 2,360 | |
| 1948 | D | 838 | 812 | 1,742 | |
| 1944 | D | 1,095 | 1,046 | 2,164 | |
| 1940 | D | 1,298 | 1,202 | 2,556 | |
| 1936 | D | 1,766 | 611 | 2,861 | |
| 1932 | D | 1,969 | 689 | 2,731 | |
| 1928 | R | 1,174 | 1,473 | 2,674 | |
| 1924 | R | 120 | 649 | 2,017 | |
| 1920 | R | 581 | 1,987 | 2,698 | |
| 1916 | D | 1,012 | 532 | 1,687 | |
| 1912 | D | 420 | 224 | 1,274 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Renville County's 2,610 residents are spread across a sparse agricultural landscape where Republican presidential margins have exceeded 60 points in recent cycles, reflecting the deep-red voting patterns typical of the state's rural grain-belt counties.
The Republican margin in Renville County reached its widest at sixty-seven points in 2024. The margin in 2024 was sixty-seven points, in line with the county's deep historical pattern.
Renville County's loyalty is rooted in its place. Median household income of $74,301, a 94% non-Hispanic-white share, and a population of 2,304 together describe a community whose political habits are deeply settled. The county's voting pattern over the last decade is most similar to that of McHenry County and Ida County.
