| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 121,110 | 58,019 | 182,411 | |
| 2020 | D | 132,570 | 58,313 | 193,822 | |
| 2016 | D | 108,000 | 52,469 | 168,722 | |
| 2012 | D | 103,989 | 53,105 | 159,154 | |
| 2008 | D | 105,656 | 57,941 | 165,037 | |
| 2004 | D | 76,283 | 56,212 | 133,801 | |
| 2000 | D | 63,179 | 50,164 | 116,481 | |
| 1996 | D | 52,222 | 39,092 | 95,230 | |
| 1992 | D | 53,648 | 43,744 | 106,250 | |
| 1988 | R | 36,420 | 43,841 | 83,123 | |
| 1984 | R | 32,212 | 46,773 | 81,429 | |
| 1980 | R | 33,158 | 36,337 | 72,869 | |
| 1976 | D | 36,855 | 32,727 | 69,962 | |
| 1972 | R | 21,462 | 39,746 | 61,995 | |
| 1968 | R | 18,198 | 26,215 | 51,445 | |
| 1964 | R | 17,939 | 27,306 | 45,245 | |
| 1960 | R | 11,694 | 20,736 | 32,430 | |
| 1956 | R | 6,154 | 6,714 | 22,384 | |
| 1952 | R | 8,890 | 15,925 | 24,815 | |
| 1948 | D | 2,419 | 670 | 9,193 | |
| 1944 | D | 6,590 | 140 | 7,077 | |
| 1940 | D | 4,781 | 167 | 4,948 | |
| 1936 | D | 6,728 | 0 | 6,880 | |
| 1932 | D | 4,371 | 0 | 4,500 | |
| 1928 | D | 3,158 | 444 | 3,602 | |
| 1924 | D | 2,369 | 88 | 2,531 | |
| 1920 | D | 2,434 | 295 | 2,729 | |
| 1916 | D | 2,283 | 292 | 2,607 | |
| 1912 | D | 1,557 | 0 | 1,766 | |
| 1908 | D | 1,750 | 236 | 2,007 | |
| 1904 | D | 1,220 | 122 | 1,342 | |
| 1900 | D | 445 | 62 | 507 | |
| 1896 | D | 925 | 468 | 1,422 | |
| 1892 | D | 788 | 146 | 934 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Richland County, seat of the state capital and the University of South Carolina, delivered one of the state's widest presidential margins in 2024, reflecting a heavily urban and college-educated electorate concentrated in Columbia.
The Democratic margin in Richland County reached its widest at ninety-eight points in 1936. The margin in 2024 was thirty-five points — still decisive.
Richland County's loyalty is rooted in its place. Median household income of $63,784, a 40% non-Hispanic-white share, and a population of 422,117 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 Dougherty County and Richmond County.
