| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 16,886 | 37,500 | 55,104 | |
| 2020 | R | 18,887 | 37,806 | 57,661 | |
| 2016 | R | 16,878 | 33,959 | 52,416 | |
| 2012 | R | 17,722 | 31,590 | 50,099 | |
| 2008 | R | 16,438 | 31,434 | 48,602 | |
| 2004 | R | 15,345 | 26,181 | 42,135 | |
| 2000 | R | 15,843 | 20,421 | 37,155 | |
| 1996 | D | 18,617 | 15,517 | 37,591 | |
| 1992 | D | 15,194 | 14,128 | 34,245 | |
| 1988 | R | 13,527 | 16,669 | 30,688 | |
| 1984 | R | 12,799 | 19,580 | 32,579 | |
| 1980 | D | 15,272 | 15,187 | 31,342 | |
| 1976 | D | 14,432 | 9,242 | 24,311 | |
| 1972 | R | 5,227 | 11,607 | 18,457 | |
| 1968 | D | 4,983 | 2,907 | 20,978 | |
| 1964 | D | 9,732 | 7,109 | 16,841 | |
| 1960 | D | 6,648 | 3,285 | 14,351 | |
| 1956 | R | 4,831 | 5,788 | 11,185 | |
| 1952 | D | 5,850 | 5,166 | 11,016 | |
| 1948 | D | 2,184 | 1,287 | 7,408 | |
| 1944 | D | 4,419 | 1,572 | 5,991 | |
| 1940 | D | 5,900 | 1,284 | 7,187 | |
| 1936 | D | 4,624 | 1,374 | 6,000 | |
| 1932 | D | 4,404 | 455 | 4,862 | |
| 1928 | D | 2,834 | 1,415 | 4,249 | |
| 1924 | D | 1,626 | 479 | 2,105 | |
| 1920 | D | 1,501 | 440 | 1,941 | |
| 1916 | D | 1,326 | 159 | 1,497 | |
| 1912 | D | 1,061 | 40 | 1,326 | |
| 1908 | D | 1,116 | 240 | 1,384 | |
| 1904 | D | 623 | 170 | 805 | |
| 1900 | D | 938 | 229 | 1,167 | |
| 1896 | D | 1,429 | 395 | 1,856 | |
| 1892 | D | 786 | 132 | 918 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Tangipahoa Parish stretches from the Mississippi border to Lake Pontchartrain's north shore, blending small agricultural communities with commuter towns tied to Hammond's Southeastern Louisiana University economy.
The shift began with civil rights. 2000 marked the realignment in Tangipahoa Parish, by a twelve points margin. The Republican margin reached its widest at thirty-seven points in 2024. The 2024 margin was thirty-seven points.
The political shift has tracked, in Tangipahoa Parish, the political shift of the South more broadly. A 61% non-Hispanic-white share, a median household income of $56,760, and a 19% poverty rate describe the demographic context. The county's voting pattern over the last decade is most similar to that of Schley County and St. Charles Parish.
