| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 4,054 | 5,805 | 10,137 | |
| 2020 | R | 4,241 | 5,739 | 10,147 | |
| 2016 | R | 4,196 | 5,341 | 9,791 | |
| 2012 | D | 5,240 | 5,042 | 10,399 | |
| 2008 | R | 4,779 | 5,037 | 9,924 | |
| 2004 | R | 4,034 | 4,884 | 8,994 | |
| 2000 | D | 3,785 | 3,609 | 7,604 | |
| 1996 | D | 3,557 | 2,919 | 7,169 | |
| 1992 | R | 3,210 | 3,450 | 7,936 | |
| 1988 | R | 2,911 | 4,222 | 7,165 | |
| 1984 | R | 2,439 | 4,508 | 6,970 | |
| 1980 | D | 3,342 | 3,312 | 6,937 | |
| 1976 | D | 3,472 | 3,254 | 6,726 | |
| 1972 | R | 2,036 | 4,342 | 6,449 | |
| 1968 | R | 2,319 | 2,829 | 7,047 | |
| 1964 | D | 4,527 | 3,155 | 7,682 | |
| 1960 | R | 3,948 | 4,030 | 7,978 | |
| 1956 | R | 3,031 | 4,770 | 7,801 | |
| 1952 | R | 3,951 | 4,113 | 8,103 | |
| 1948 | R | 3,112 | 3,129 | 6,299 | |
| 1944 | R | 3,125 | 3,790 | 6,915 | |
| 1940 | D | 4,352 | 3,954 | 8,390 | |
| 1936 | R | 4,116 | 4,770 | 8,958 | |
| 1932 | D | 4,811 | 3,675 | 8,545 | |
| 1928 | R | 2,277 | 5,071 | 7,395 | |
| 1924 | R | 2,903 | 3,230 | 6,310 | |
| 1920 | R | 2,634 | 3,658 | 6,354 | |
| 1916 | R | 1,885 | 2,364 | 4,403 | |
| 1912 | D | 2,457 | 1,528 | 3,553 | |
| 1908 | D | 2,446 | 1,021 | 103 | |
| 1904 | D | 3,696 | 1,174 | 25 | |
| 1900 | R | 1,584 | 2,089 | 6 | |
| 1896 | R | 1,471 | 2,044 | 3,551 | |
| 1892 | R | 1,482 | 1,693 | 3,220 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Somerset County, anchored by the watermen's economy of Crisfield and Princess Anne, delivers some of Maryland's widest Republican presidential margins despite sitting in a reliably Democratic state — a gap driven by its rural, working-class coastal demographics.
The county's recent history is a story of close margins. The Democratic margin reached 100 points in 1904; the Republican margin reached 100 points in 1900. Most other elections have been decided by single-digit points.
Somerset County's demographics — a population of 24,822, a 52% non-Hispanic-white share, a median household income of $64,943 — situate the county close to national averages on several dimensions. The county's voting pattern over the last decade is most similar to that of Richmond County and Salem County.