| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 8,883 | 16,450 | 25,799 | |
| 2020 | R | 9,428 | 16,248 | 26,340 | |
| 2016 | R | 8,050 | 14,352 | 24,193 | |
| 2012 | R | 9,514 | 13,422 | 23,367 | |
| 2008 | R | 11,253 | 13,144 | 24,850 | |
| 2004 | R | 9,018 | 14,918 | 24,091 | |
| 2000 | R | 7,673 | 12,325 | 20,601 | |
| 1996 | R | 6,765 | 9,558 | 18,335 | |
| 1992 | R | 6,512 | 9,008 | 20,109 | |
| 1988 | R | 5,641 | 11,644 | 17,394 | |
| 1984 | R | 4,803 | 13,503 | 18,396 | |
| 1980 | R | 4,067 | 12,533 | 18,871 | |
| 1976 | R | 6,463 | 11,073 | 17,797 | |
| 1972 | R | 4,743 | 13,512 | 18,290 | |
| 1968 | R | 4,399 | 12,168 | 17,641 | |
| 1964 | R | 6,917 | 10,430 | 17,347 | |
| 1960 | R | 4,792 | 13,226 | 18,025 | |
| 1956 | R | 3,660 | 13,194 | 16,870 | |
| 1952 | R | 3,796 | 13,351 | 17,163 | |
| 1948 | R | 3,796 | 9,519 | 13,378 | |
| 1944 | R | 3,951 | 10,680 | 14,712 | |
| 1940 | R | 4,833 | 11,838 | 16,742 | |
| 1936 | R | 5,776 | 9,576 | 15,546 | |
| 1932 | R | 5,416 | 8,224 | 13,912 | |
| 1928 | R | 2,691 | 9,808 | 12,546 | |
| 1924 | R | 1,591 | 8,449 | 11,799 | |
| 1920 | R | 1,720 | 9,322 | 11,233 | |
| 1916 | R | 3,207 | 8,639 | 12,283 | |
| 1912 | R | 1,750 | 2,014 | 6,745 | |
| 1908 | R | 1,761 | 4,848 | 7,002 | |
| 1904 | R | 1,209 | 5,109 | 6,799 | |
| 1900 | R | 2,171 | 5,255 | 7,619 | |
| 1896 | R | 2,142 | 5,210 | 7,529 | |
| 1892 | R | 2,244 | 3,939 | 6,499 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Ogle County's mix of small manufacturing towns and agricultural townships has trended steadily more Republican over the past four presidential cycles, reaching a 29-point margin in 2024 despite modest population decline.
The Republican margin in Ogle County reached its widest at sixty-eight points in 1920. The margin in 2024 was twenty-nine points, in line with the county's deep historical pattern.
Ogle County's loyalty is rooted in its place. Median household income of $82,132, a 86% non-Hispanic-white share, and a population of 51,495 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 Allegan County and Orange County.
