| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 4,079 | 17,044 | 21,285 | |
| 2020 | R | 4,458 | 16,760 | 21,442 | |
| 2016 | R | 3,583 | 14,561 | 18,714 | |
| 2012 | R | 4,181 | 12,826 | 17,197 | |
| 2008 | R | 5,243 | 12,952 | 18,362 | |
| 2004 | R | 5,338 | 12,054 | 17,470 | |
| 2000 | R | 5,553 | 9,775 | 15,430 | |
| 1996 | R | 6,075 | 6,393 | 13,722 | |
| 1992 | D | 6,328 | 5,778 | 16,243 | |
| 1988 | R | 7,553 | 8,021 | 15,598 | |
| 1984 | R | 5,504 | 9,273 | 14,820 | |
| 1980 | D | 7,178 | 6,094 | 13,490 | |
| 1976 | D | 8,601 | 4,443 | 13,076 | |
| 1972 | R | 2,865 | 7,736 | 10,652 | |
| 1968 | D | 4,635 | 3,395 | 10,933 | |
| 1964 | D | 6,303 | 2,594 | 8,905 | |
| 1960 | D | 5,084 | 3,964 | 9,076 | |
| 1956 | D | 4,202 | 4,154 | 8,381 | |
| 1952 | D | 5,524 | 3,929 | 9,453 | |
| 1948 | D | 6,306 | 1,018 | 8,365 | |
| 1944 | D | 6,283 | 725 | 7,747 | |
| 1940 | D | 8,038 | 761 | 8,805 | |
| 1936 | D | 5,621 | 308 | 5,939 | |
| 1932 | D | 5,911 | 375 | 6,307 | |
| 1928 | R | 2,163 | 2,887 | 5,058 | |
| 1924 | D | 458 | 73 | 541 | |
| 1920 | D | 3,765 | 639 | 5,006 | |
| 1916 | D | 3,412 | 309 | 3,824 | |
| 1912 | D | 2,286 | 206 | 2,758 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Lamar County's R+60.9 margin in 2024 reflects a pattern of accelerating Republican consolidation across northeast Texas, even as its population edges below 50,000 and Paris, the county seat, contends with long-term economic stagnation.
The unraveling was not abrupt. The Democratic margin in Lamar County peaked at eighty-nine points in 1936; it narrowed steadily over the late twentieth century. The 1996 election delivered the county to the Republican party for the first time in many years, by a margin of two points. By 2024, the margin had widened further.
The economic and demographic context is severe. Lamar County's median household income of $61,880 is among the lowest of any county in the United States; 19% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Henderson County and Upshur County.