| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 9,504 | 19,511 | 29,331 | |
| 2020 | R | 11,027 | 21,251 | 32,713 | |
| 2016 | R | 10,698 | 20,903 | 32,454 | |
| 2012 | R | 12,132 | 20,892 | 33,397 | |
| 2008 | R | 12,492 | 20,127 | 33,168 | |
| 2004 | R | 12,426 | 19,420 | 32,273 | |
| 2000 | R | 11,762 | 17,236 | 30,020 | |
| 1996 | D | 15,087 | 12,014 | 29,965 | |
| 1992 | D | 13,040 | 11,905 | 30,530 | |
| 1988 | R | 12,166 | 15,438 | 28,331 | |
| 1984 | R | 10,170 | 17,727 | 28,526 | |
| 1980 | R | 9,681 | 14,273 | 25,028 | |
| 1976 | R | 9,984 | 10,392 | 20,753 | |
| 1972 | R | 5,143 | 11,812 | 17,940 | |
| 1968 | D | 5,510 | 5,448 | 19,029 | |
| 1964 | D | 8,196 | 8,141 | 16,337 | |
| 1960 | D | 9,235 | 3,551 | 15,470 | |
| 1956 | R | 3,544 | 6,733 | 10,615 | |
| 1952 | R | 4,040 | 5,669 | 9,709 | |
| 1948 | R | 1,015 | 2,910 | 6,157 | |
| 1944 | D | 3,661 | 1,141 | 4,802 | |
| 1940 | D | 4,091 | 1,706 | 5,797 | |
| 1936 | D | 2,595 | 1,234 | 3,829 | |
| 1932 | D | 2,412 | 798 | 3,210 | |
| 1928 | D | 2,561 | 413 | 2,974 | |
| 1924 | D | 740 | 679 | 1,419 | |
| 1920 | R | 438 | 1,275 | 1,713 | |
| 1916 | D | 802 | 134 | 1,786 | |
| 1912 | D | 666 | 222 | 1,296 | |
| 1908 | D | 820 | 328 | 1,200 | |
| 1904 | D | 734 | 205 | 962 | |
| 1900 | D | 1,030 | 668 | 1,698 | |
| 1896 | D | 939 | 391 | 1,341 | |
| 1892 | D | 576 | 13 | 589 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Iberia Parish anchors Louisiana's Acadiana region, where a Cajun cultural identity and petroleum-industry employment have long reinforced a conservative tilt—the 2024 presidential margin of R+34 reflects a alignment that has deepened steadily over two decades.
The shift began with civil rights. 2000 marked the realignment in Iberia Parish, by a eighteen points margin. The Republican margin reached its widest at forty-nine points in 1920. The 2024 margin was thirty-four points.
The political shift has tracked, in Iberia Parish, the political shift of the South more broadly. A 57% non-Hispanic-white share, a median household income of $56,961, and a 23% poverty rate describe the demographic context. The county's voting pattern over the last decade is most similar to that of Winn Parish and Catahoula Parish.
