| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 4,824 | 10,685 | 15,830 | |
| 2020 | R | 4,737 | 10,121 | 15,326 | |
| 2016 | R | 3,484 | 8,452 | 12,933 | |
| 2012 | R | 4,367 | 7,556 | 12,180 | |
| 2008 | R | 4,753 | 7,120 | 12,122 | |
| 2004 | R | 3,619 | 7,763 | 11,529 | |
| 2000 | R | 3,656 | 6,144 | 10,280 | |
| 1996 | R | 3,477 | 4,878 | 9,685 | |
| 1992 | R | 2,949 | 4,314 | 9,979 | |
| 1988 | R | 3,677 | 4,664 | 8,387 | |
| 1984 | R | 2,499 | 5,461 | 8,026 | |
| 1980 | R | 2,007 | 5,193 | 7,818 | |
| 1976 | R | 3,205 | 3,807 | 7,141 | |
| 1972 | R | 1,805 | 4,503 | 6,308 | |
| 1968 | R | 1,739 | 3,185 | 5,529 | |
| 1964 | D | 3,975 | 2,947 | 6,922 | |
| 1960 | R | 2,799 | 4,506 | 7,305 | |
| 1956 | R | 2,723 | 4,814 | 7,537 | |
| 1952 | R | 2,602 | 5,088 | 7,690 | |
| 1948 | R | 3,041 | 3,527 | 6,568 | |
| 1944 | R | 3,144 | 4,588 | 7,732 | |
| 1940 | R | 3,627 | 4,704 | 8,331 | |
| 1936 | D | 4,922 | 3,669 | 8,645 | |
| 1932 | D | 5,155 | 2,756 | 8,072 | |
| 1928 | R | 2,739 | 4,970 | 7,777 | |
| 1924 | R | 2,352 | 3,639 | 7,344 | |
| 1920 | R | 2,192 | 3,575 | 6,127 | |
| 1916 | D | 2,595 | 1,927 | 4,724 | |
| 1912 | D | 2,009 | 970 | 4,329 | |
| 1908 | R | 2,387 | 2,440 | 4,970 | |
| 1904 | R | 1,466 | 2,711 | 4,614 | |
| 1900 | R | 2,259 | 2,922 | 5,311 | |
| 1896 | R | 2,454 | 2,639 | 5,201 | |
| 1892 | D | 2,173 | 723 | 4,581 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Cass County sits just south of the Omaha metro, where low-density exurban growth has accompanied consistently large Republican presidential margins — 37 points in 2024 — making it one of the more reliably right-leaning counties in the state's eastern tier.
The Republican margin in Cass County reached its widest at forty-three points in 1972. The margin in 2024 was thirty-seven points, in line with the county's deep historical pattern.
Cass County's loyalty is rooted in its place. Median household income of $91,836, a 91% non-Hispanic-white share, and a population of 27,161 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 Seward County and Saunders County.
