| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 8,428 | 26,260 | 35,070 | |
| 2020 | R | 8,692 | 24,536 | 33,717 | |
| 2016 | R | 6,637 | 19,410 | 27,113 | |
| 2012 | R | 8,290 | 17,643 | 26,289 | |
| 2008 | R | 9,318 | 17,903 | 27,614 | |
| 2004 | R | 9,865 | 15,331 | 25,323 | |
| 2000 | D | 10,249 | 9,675 | 20,164 | |
| 1996 | D | 8,465 | 6,685 | 16,229 | |
| 1992 | D | 8,498 | 5,271 | 15,779 | |
| 1988 | D | 5,884 | 5,714 | 11,672 | |
| 1984 | D | 5,756 | 5,445 | 11,263 | |
| 1980 | D | 7,381 | 3,560 | 11,126 | |
| 1976 | D | 7,547 | 2,505 | 10,114 | |
| 1972 | R | 2,985 | 4,175 | 7,399 | |
| 1968 | D | 2,315 | 1,802 | 8,021 | |
| 1964 | D | 5,784 | 1,797 | 7,581 | |
| 1960 | D | 4,053 | 1,776 | 5,891 | |
| 1956 | D | 4,961 | 1,517 | 6,526 | |
| 1952 | D | 5,063 | 1,834 | 6,897 | |
| 1948 | D | 3,044 | 376 | 3,946 | |
| 1944 | D | 3,074 | 622 | 3,708 | |
| 1940 | D | 3,258 | 490 | 3,767 | |
| 1936 | D | 2,629 | 388 | 3,056 | |
| 1932 | D | 2,752 | 252 | 3,034 | |
| 1928 | D | 1,543 | 848 | 2,402 | |
| 1924 | D | 1,645 | 229 | 1,918 | |
| 1920 | D | 3,046 | 1,191 | 4,248 | |
| 1916 | D | 2,106 | 733 | 2,923 | |
| 1912 | D | 2,287 | 513 | 3,067 | |
| 1908 | D | 2,418 | 755 | 3,188 | |
| 1904 | D | 2,308 | 811 | 3,186 | |
| 1900 | D | 2,564 | 1,128 | 3,765 | |
| 1896 | D | 2,943 | 1,386 | 4,526 | |
| 1892 | D | 1,938 | 879 | 3,654 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Robertson County, anchored by Springfield north of Nashville, has shifted steadily rightward over two decades as its small-town and agricultural communities diverged from the urbanizing metro core nearby.
The unraveling was not abrupt. The Democratic margin in Robertson County peaked at eighty-two points in 1932; it narrowed steadily over the late twentieth century. The 2004 election delivered the county to the Republican party for the first time in many years, by a margin of twenty-two points. By 2024, the margin had widened further.
The economic and demographic context is severe. Robertson County's median household income of $83,047 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 Bedford County and Moore County.