| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 915 | 2,443 | 3,439 | |
| 2020 | R | 921 | 2,428 | 3,432 | |
| 2016 | R | 785 | 2,116 | 3,161 | |
| 2012 | R | 1,128 | 2,012 | 3,214 | |
| 2008 | R | 1,240 | 2,134 | 3,474 | |
| 2004 | R | 1,066 | 2,595 | 3,715 | |
| 2000 | R | 1,063 | 2,177 | 3,369 | |
| 1996 | R | 1,232 | 1,888 | 3,635 | |
| 1992 | R | 1,110 | 1,696 | 3,854 | |
| 1988 | R | 1,457 | 2,295 | 3,787 | |
| 1984 | R | 1,004 | 2,752 | 3,793 | |
| 1980 | R | 930 | 2,695 | 3,911 | |
| 1976 | R | 1,406 | 2,093 | 3,544 | |
| 1972 | R | 909 | 2,600 | 3,509 | |
| 1968 | R | 1,023 | 2,290 | 3,608 | |
| 1964 | D | 2,084 | 1,936 | 4,020 | |
| 1960 | R | 1,377 | 3,031 | 4,408 | |
| 1956 | R | 1,434 | 3,141 | 4,575 | |
| 1952 | R | 1,432 | 3,735 | 5,167 | |
| 1948 | R | 1,687 | 2,413 | 4,100 | |
| 1944 | R | 1,785 | 3,267 | 5,052 | |
| 1940 | R | 2,549 | 3,817 | 6,366 | |
| 1936 | D | 3,459 | 2,720 | 6,202 | |
| 1932 | D | 3,593 | 2,075 | 5,709 | |
| 1928 | R | 1,767 | 3,777 | 5,548 | |
| 1924 | R | 1,871 | 2,378 | 4,856 | |
| 1920 | R | 1,512 | 2,888 | 4,511 | |
| 1916 | D | 1,658 | 1,438 | 3,179 | |
| 1912 | D | 1,374 | 672 | 2,987 | |
| 1908 | D | 1,674 | 1,583 | 3,347 | |
| 1904 | R | 786 | 1,946 | 3,209 | |
| 1900 | R | 1,779 | 1,783 | 3,648 | |
| 1896 | D | 1,930 | 1,449 | 3,423 | |
| 1892 | D | 1,105 | 367 | 2,698 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Nemaha County, tucked into Nebraska's southeast corner along the Missouri River, has delivered Republican presidential margins exceeding 40 points in recent cycles, reflecting the deep conservative lean common across rural, agriculturally dependent Great Plains counties.
The Democratic margin in Nemaha County peaked at twenty-seven points in 1892. By 1968 the county had flipped, voting Republican for the first time in many years. The 2024 margin was forty-four points, the most Republican-leaning result in the county's modern history.
The economic context is the key. Nemaha County's median household income of $60,924 sits well below state and national norms, and 13% of residents live below the federal poverty line. The shift here is part of a broader realignment of working-class places across the country. The county's voting pattern over the last decade is most similar to that of Payette County and Merrick County.