| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 7,625 | 25,226 | 33,209 | |
| 2020 | R | 6,948 | 21,713 | 29,347 | |
| 2016 | R | 4,919 | 17,610 | 23,391 | |
| 2012 | R | 5,058 | 16,707 | 22,073 | |
| 2008 | R | 6,058 | 15,815 | 22,184 | |
| 2004 | R | 5,708 | 14,041 | 19,864 | |
| 2000 | R | 5,905 | 10,266 | 16,406 | |
| 1996 | R | 5,552 | 7,097 | 13,730 | |
| 1992 | R | 5,414 | 6,444 | 13,510 | |
| 1988 | R | 3,480 | 7,122 | 10,679 | |
| 1984 | R | 3,227 | 7,113 | 10,405 | |
| 1980 | R | 3,699 | 6,382 | 10,376 | |
| 1976 | D | 4,683 | 4,458 | 9,233 | |
| 1972 | R | 1,604 | 5,357 | 7,131 | |
| 1968 | R | 1,581 | 4,299 | 7,876 | |
| 1964 | R | 3,365 | 4,148 | 7,513 | |
| 1960 | R | 2,722 | 5,356 | 8,181 | |
| 1956 | R | 2,844 | 4,583 | 7,524 | |
| 1952 | R | 2,138 | 4,311 | 6,481 | |
| 1948 | R | 1,673 | 2,605 | 4,515 | |
| 1944 | R | 1,632 | 3,147 | 4,787 | |
| 1940 | R | 2,068 | 2,226 | 4,317 | |
| 1936 | R | 2,146 | 2,343 | 4,507 | |
| 1932 | R | 1,629 | 1,817 | 3,503 | |
| 1928 | R | 589 | 2,127 | 2,719 | |
| 1924 | R | 703 | 1,533 | 2,302 | |
| 1920 | R | 686 | 1,872 | 2,575 | |
| 1916 | R | 423 | 698 | 1,124 | |
| 1912 | D | 415 | 322 | 1,091 | |
| 1908 | R | 444 | 986 | 1,450 | |
| 1904 | R | 356 | 810 | 1,184 | |
| 1900 | R | 512 | 1,116 | 1,637 | |
| 1896 | R | 594 | 1,447 | 2,055 | |
| 1892 | R | 491 | 1,037 | 1,582 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Loudon County's population has climbed steadily as Knoxville's metro fringe expands southward, and its presidential margins have consistently exceeded 50 points Republican across recent cycles, reflecting a heavily white, owner-occupied suburban-rural electorate.
The Republican margin in Loudon County reached its widest at fifty-seven points in 1928. The margin in 2024 was fifty-three points, in line with the county's deep historical pattern.
Loudon County's loyalty is rooted in its place. Median household income of $84,185, a 87% non-Hispanic-white share, and a population of 58,580 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 Gilmer County and Floyd County.