| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 10,280 | 32,299 | 43,209 | |
| 2020 | R | 10,552 | 30,708 | 41,998 | |
| 2016 | R | 8,255 | 26,210 | 36,069 | |
| 2012 | R | 9,971 | 21,306 | 31,779 | |
| 2008 | R | 10,177 | 20,102 | 30,726 | |
| 2004 | R | 9,043 | 19,433 | 28,627 | |
| 2000 | R | 8,195 | 14,054 | 22,701 | |
| 1996 | R | 7,651 | 8,697 | 18,395 | |
| 1992 | D | 7,830 | 7,745 | 18,969 | |
| 1988 | R | 6,005 | 8,859 | 15,013 | |
| 1984 | R | 5,005 | 9,556 | 14,676 | |
| 1980 | R | 5,884 | 6,364 | 12,576 | |
| 1976 | D | 5,623 | 3,639 | 9,477 | |
| 1972 | R | 2,827 | 4,517 | 7,553 | |
| 1968 | D | 2,135 | 1,965 | 6,310 | |
| 1964 | D | 3,900 | 1,417 | 5,330 | |
| 1960 | R | 2,437 | 2,683 | 5,120 | |
| 1956 | D | 2,279 | 2,007 | 4,290 | |
| 1952 | D | 2,121 | 1,292 | 3,418 | |
| 1948 | D | 1,681 | 673 | 2,385 | |
| 1944 | D | 2,092 | 876 | 2,976 | |
| 1940 | D | 2,388 | 813 | 3,207 | |
| 1936 | D | 2,474 | 647 | 3,136 | |
| 1932 | D | 2,918 | 1,088 | 4,014 | |
| 1928 | R | 1,758 | 1,793 | 3,554 | |
| 1924 | D | 1,789 | 946 | 2,863 | |
| 1920 | D | 2,548 | 1,393 | 3,954 | |
| 1916 | D | 1,508 | 826 | 2,342 | |
| 1912 | D | 1,299 | 209 | 1,995 | |
| 1908 | D | 1,409 | 726 | 2,176 | |
| 1904 | D | 1,284 | 593 | 1,918 | |
| 1900 | D | 1,442 | 772 | 2,229 | |
| 1896 | D | 1,168 | 799 | 2,048 | |
| 1892 | D | 862 | 398 | 1,419 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Bullitt County sits at Louisville's southern edge and has urbanized rapidly over the past two decades, yet its presidential margins have widened alongside its population, reaching R+51 in 2024.
The unraveling was not abrupt. The Democratic margin in Bullitt County peaked at fifty-eight 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 six points. By 2024, the margin had widened further.
The economic and demographic context is severe. Bullitt County's median household income of $80,558 is among the lowest of any county in the United States; 10% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Barren County and Jeff Davis County.