| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 6,008 | 7,627 | 13,836 | |
| 2020 | R | 6,200 | 7,684 | 14,097 | |
| 2016 | R | 5,383 | 6,927 | 12,712 | |
| 2012 | R | 5,692 | 6,922 | 12,774 | |
| 2008 | R | 5,043 | 6,654 | 11,866 | |
| 2004 | R | 4,932 | 5,822 | 10,835 | |
| 2000 | D | 5,058 | 4,924 | 10,169 | |
| 1996 | D | 5,697 | 3,254 | 9,798 | |
| 1992 | D | 5,131 | 3,522 | 9,976 | |
| 1988 | D | 4,686 | 3,972 | 8,801 | |
| 1984 | D | 4,631 | 4,189 | 8,883 | |
| 1980 | D | 4,739 | 2,828 | 7,753 | |
| 1976 | D | 3,809 | 1,913 | 5,884 | |
| 1972 | R | 1,849 | 2,626 | 4,942 | |
| 1968 | D | 2,016 | 669 | 5,254 | |
| 1964 | R | 1,835 | 1,892 | 3,727 | |
| 1960 | D | 2,315 | 390 | 3,141 | |
| 1956 | D | 1,208 | 1,035 | 2,314 | |
| 1952 | D | 1,280 | 704 | 1,984 | |
| 1948 | D | 557 | 141 | 1,167 | |
| 1944 | D | 1,045 | 87 | 1,132 | |
| 1940 | D | 1,185 | 141 | 1,326 | |
| 1936 | D | 868 | 80 | 949 | |
| 1932 | D | 593 | 96 | 689 | |
| 1928 | D | 608 | 78 | 686 | |
| 1924 | D | 191 | 92 | 324 | |
| 1920 | D | 352 | 175 | 527 | |
| 1916 | D | 237 | 28 | 270 | |
| 1912 | D | 170 | 19 | 204 | |
| 1908 | D | 198 | 9 | 207 | |
| 1904 | D | 233 | 5 | 238 | |
| 1900 | D | 185 | 38 | 223 | |
| 1896 | R | 237 | 279 | 542 | |
| 1892 | D | 1,487 | 227 | 1,714 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
West Baton Rouge Parish sits across the Mississippi from Louisiana's capital, with a petrochemical corridor that anchors its economy and a population just over 21,000 that has leaned Republican by double digits in recent presidential cycles.
The shift began with civil rights. 2004 marked the realignment in West Baton Rouge Parish, by a eight points margin. The Republican margin reached its widest at sixteen points in 1972. The 2024 margin was twelve points.
The political shift has tracked, in West Baton Rouge Parish, the political shift of the South more broadly. A 53% non-Hispanic-white share, a median household income of $87,299, and a 13% poverty rate describe the demographic context. The county's voting pattern over the last decade is most similar to that of East Feliciana Parish and Lafayette County.
