| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 7,038 | 20,775 | 28,262 | |
| 2020 | R | 7,340 | 20,704 | 28,530 | |
| 2016 | R | 5,190 | 18,751 | 24,592 | |
| 2012 | R | 5,494 | 19,101 | 24,889 | |
| 2008 | R | 5,159 | 18,497 | 23,910 | |
| 2004 | R | 3,923 | 16,410 | 20,465 | |
| 2000 | R | 3,478 | 12,795 | 16,602 | |
| 1996 | R | 3,169 | 8,609 | 12,774 | |
| 1992 | R | 3,208 | 8,259 | 13,032 | |
| 1988 | R | 2,535 | 9,145 | 11,746 | |
| 1984 | R | 1,964 | 7,929 | 9,930 | |
| 1980 | R | 3,005 | 5,395 | 8,546 | |
| 1976 | R | 3,109 | 4,056 | 7,414 | |
| 1972 | R | 493 | 5,022 | 5,682 | |
| 1968 | R | 351 | 546 | 5,319 | |
| 1964 | R | 334 | 3,372 | 3,706 | |
| 1960 | D | 651 | 636 | 2,333 | |
| 1956 | D | 805 | 429 | 1,718 | |
| 1952 | D | 1,260 | 1,034 | 2,294 | |
| 1948 | D | 91 | 36 | 1,469 | |
| 1944 | D | 1,065 | 93 | 1,158 | |
| 1940 | D | 1,148 | 55 | 1,203 | |
| 1936 | D | 1,210 | 91 | 1,306 | |
| 1932 | D | 1,033 | 31 | 1,069 | |
| 1928 | D | 718 | 410 | 1,128 | |
| 1924 | D | 795 | 80 | 911 | |
| 1920 | D | 672 | 192 | 883 | |
| 1916 | D | 744 | 89 | 882 | |
| 1912 | D | 399 | 16 | 505 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Lamar County sits in the Pine Belt region south of Hattiesburg and has posted some of the state's steepest population gains over the past decade, driven largely by suburban spillover — a growth pattern that has so far reinforced rather than diluted its wide Republican margins.
The shift began with civil rights. 1964 marked the realignment in Lamar County, by a eighty-two points margin. The Republican margin reached its widest at eighty-two points in 1964. The 2024 margin was forty-nine points.
The political shift has tracked, in Lamar County, the political shift of the South more broadly. A 71% non-Hispanic-white share, a median household income of $70,909, and a 15% poverty rate describe the demographic context. The county's voting pattern over the last decade is most similar to that of Rankin County and Clay County.