| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 33,087 | 79,666 | 114,698 | |
| 2020 | R | 33,268 | 79,700 | 114,950 | |
| 2016 | R | 22,977 | 73,020 | 98,962 | |
| 2012 | R | 20,051 | 71,436 | 92,507 | |
| 2008 | R | 20,625 | 69,060 | 90,643 | |
| 2004 | R | 14,850 | 63,435 | 78,906 | |
| 2000 | R | 13,183 | 47,651 | 62,128 | |
| 1996 | R | 11,280 | 37,090 | 50,773 | |
| 1992 | R | 10,317 | 32,736 | 48,165 | |
| 1988 | R | 7,138 | 27,052 | 34,314 | |
| 1984 | R | 5,884 | 21,858 | 28,068 | |
| 1980 | R | 7,396 | 14,957 | 23,267 | |
| 1976 | R | 7,197 | 9,035 | 16,629 | |
| 1972 | R | 1,859 | 9,390 | 11,558 | |
| 1968 | R | 1,105 | 1,706 | 10,770 | |
| 1964 | R | 0 | 6,037 | 7,980 | |
| 1960 | D | 3,225 | 3,157 | 6,428 | |
| 1956 | R | 2,502 | 2,901 | 5,581 | |
| 1952 | D | 2,473 | 2,156 | 4,636 | |
| 1948 | R | 0 | 921 | 2,820 | |
| 1944 | D | 1,955 | 945 | 2,913 | |
| 1940 | D | 2,777 | 938 | 3,722 | |
| 1936 | D | 2,399 | 1,465 | 3,880 | |
| 1932 | D | 2,185 | 1,449 | 3,675 | |
| 1928 | R | 1,679 | 2,502 | 4,203 | |
| 1924 | D | 1,882 | 1,753 | 3,827 | |
| 1920 | R | 2,523 | 3,235 | 5,782 | |
| 1916 | R | 1,311 | 1,428 | 2,756 | |
| 1912 | D | 1,181 | 201 | 2,657 | |
| 1908 | R | 1,011 | 1,231 | 2,492 | |
| 1904 | D | 1,106 | 679 | 2,438 | |
| 1900 | R | 749 | 1,389 | 2,275 | |
| 1896 | D | 1,582 | 1,051 | 2,717 | |
| 1892 | D | 1,755 | 307 | 3,656 | |
| 1888 | D | 1,626 | 1,037 | 2,681 | |
| 1884 | D | 1,389 | 1,123 | 2,536 | |
| 1880 | D | 1,455 | 840 | 2,303 | |
| 1876 | D | 1,475 | 770 | 2,245 |
Shelby County has added residents faster than almost any other Alabama county over the past two decades, drawing white-collar commuters from Birmingham. That suburban growth has yet to dent its deep-red presidential margins, which held above 40 points in 2024.
The Republican margin in Shelby County reached its widest at seventy-six points in 1964. The margin in 2024 was forty-one points, in line with the county's deep historical pattern.
Shelby County's loyalty is rooted in its place. Median household income of $97,961, a 76% non-Hispanic-white share, and a population of 230,211 together describe a community whose political habits are deeply settled. The county's voting pattern over the last decade is most similar to that of Rankin County and Clay County.
