| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 43,825 | 55,567 | 101,299 | |
| 2020 | R | 41,206 | 51,979 | 96,193 | |
| 2016 | R | 28,033 | 45,143 | 80,580 | |
| 2012 | R | 26,671 | 43,213 | 71,490 | |
| 2008 | R | 28,010 | 38,816 | 68,022 | |
| 2004 | R | 17,455 | 40,163 | 58,334 | |
| 2000 | R | 14,637 | 28,979 | 45,278 | |
| 1996 | R | 12,806 | 23,023 | 39,877 | |
| 1992 | R | 10,741 | 20,516 | 40,673 | |
| 1988 | R | 10,947 | 20,192 | 31,285 | |
| 1984 | R | 6,838 | 20,192 | 27,160 | |
| 1980 | R | 5,689 | 15,552 | 23,202 | |
| 1976 | R | 7,385 | 11,917 | 19,716 | |
| 1972 | R | 3,904 | 11,514 | 15,418 | |
| 1968 | R | 3,506 | 6,019 | 11,470 | |
| 1964 | D | 5,581 | 4,418 | 9,999 | |
| 1960 | R | 3,777 | 4,672 | 8,449 | |
| 1956 | R | 2,501 | 3,826 | 6,327 | |
| 1952 | R | 2,529 | 3,649 | 6,178 | |
| 1948 | D | 2,635 | 2,367 | 5,002 | |
| 1944 | D | 2,654 | 2,641 | 5,295 | |
| 1940 | D | 2,537 | 2,165 | 4,702 | |
| 1936 | D | 3,030 | 1,569 | 4,649 | |
| 1932 | D | 3,112 | 1,148 | 4,329 | |
| 1928 | R | 1,900 | 2,011 | 3,940 | |
| 1924 | R | 1,247 | 1,411 | 3,631 | |
| 1920 | R | 1,027 | 1,662 | 2,780 | |
| 1916 | D | 1,320 | 885 | 2,258 | |
| 1912 | D | 857 | 404 | 1,793 | |
| 1908 | D | 1,090 | 912 | 2,069 | |
| 1904 | R | 675 | 998 | 1,859 | |
| 1900 | D | 1,090 | 792 | 1,928 | |
| 1896 | D | 1,183 | 674 | 1,916 | |
| 1892 | D | 582 | 351 | 1,486 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Sarpy County sits at the edge of the Omaha metro and has added residents faster than almost any Nebraska county this decade, drawing young families and defense-sector workers tied to Offutt Air Force Base. Its R+11.7 margin in 2024 is notably narrower than Nebraska's rural interior.
The Republican margin in Sarpy County reached its widest at forty-nine points in 1972. The margin in 2024 was twelve points, in line with the county's deep historical pattern.
Sarpy County's loyalty is rooted in its place. Median household income of $103,321, a 79% non-Hispanic-white share, and a population of 197,389 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 Boone County and Hendricks County.