| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 7,462 | 14,109 | 21,897 | |
| 2020 | R | 7,606 | 13,207 | 21,151 | |
| 2016 | R | 6,436 | 11,121 | 18,594 | |
| 2012 | R | 8,330 | 9,534 | 18,130 | |
| 2008 | D | 9,974 | 8,763 | 19,064 | |
| 2004 | R | 9,381 | 9,680 | 19,238 | |
| 2000 | R | 7,970 | 8,871 | 17,316 | |
| 1996 | D | 8,561 | 5,925 | 16,150 | |
| 1992 | D | 8,387 | 6,027 | 17,962 | |
| 1988 | D | 8,891 | 7,114 | 16,065 | |
| 1984 | R | 7,934 | 8,952 | 16,942 | |
| 1980 | D | 8,475 | 8,146 | 17,692 | |
| 1976 | D | 9,027 | 7,809 | 17,033 | |
| 1972 | D | 8,003 | 7,647 | 15,886 | |
| 1968 | D | 7,821 | 5,829 | 14,364 | |
| 1964 | D | 10,046 | 4,434 | 14,507 | |
| 1960 | D | 7,924 | 6,460 | 14,413 | |
| 1956 | R | 6,489 | 7,766 | 14,300 | |
| 1952 | R | 6,921 | 7,488 | 14,458 | |
| 1948 | D | 6,943 | 5,414 | 12,633 | |
| 1944 | D | 7,375 | 5,213 | 12,644 | |
| 1940 | D | 8,802 | 6,218 | 15,101 | |
| 1936 | D | 8,954 | 4,527 | 13,791 | |
| 1932 | D | 7,363 | 4,386 | 12,285 | |
| 1928 | R | 5,419 | 5,420 | 10,930 | |
| 1924 | R | 463 | 4,761 | 9,554 | |
| 1920 | R | 1,985 | 4,938 | 7,550 | |
| 1916 | R | 1,781 | 3,088 | 5,169 | |
| 1912 | R | 1,066 | 1,111 | 4,378 | |
| 1908 | R | 1,097 | 3,243 | 4,523 | |
| 1904 | R | 658 | 3,332 | 4,171 | |
| 1900 | R | 1,210 | 3,081 | 4,343 | |
| 1896 | R | 1,237 | 2,774 | 4,091 | |
| 1892 | R | 1,412 | 1,769 | 3,258 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Delta County sits on Little Bay de Noc along Michigan's Upper Peninsula, where a predominantly rural, non-Hispanic white population has shifted sharply toward Republican margins over the past decade, reaching R+30.4 in 2024.
The Republican margin in Delta County reached its widest at sixty-four points in 1904. The margin in 2024 was thirty points, in line with the county's deep historical pattern.
Delta County's loyalty is rooted in its place. Median household income of $57,809, a 90% non-Hispanic-white share, and a population of 36,813 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 Burnett County and Grant County.
