| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 216 | 1,343 | 1,591 | |
| 2020 | R | 242 | 1,363 | 1,630 | |
| 2016 | R | 198 | 1,227 | 1,482 | |
| 2012 | R | 291 | 1,261 | 1,579 | |
| 2008 | R | 420 | 1,225 | 1,671 | |
| 2004 | R | 434 | 1,225 | 1,686 | |
| 2000 | R | 516 | 1,220 | 1,837 | |
| 1996 | R | 548 | 1,205 | 1,972 | |
| 1992 | R | 608 | 727 | 1,912 | |
| 1988 | R | 795 | 979 | 1,831 | |
| 1984 | R | 598 | 1,491 | 2,118 | |
| 1980 | R | 523 | 1,340 | 2,048 | |
| 1976 | R | 1,003 | 1,025 | 2,068 | |
| 1972 | R | 621 | 1,369 | 2,046 | |
| 1968 | R | 623 | 1,211 | 2,064 | |
| 1964 | D | 1,177 | 974 | 2,162 | |
| 1960 | R | 875 | 1,426 | 2,309 | |
| 1956 | R | 726 | 1,668 | 2,403 | |
| 1952 | R | 608 | 1,915 | 2,533 | |
| 1948 | R | 1,117 | 1,237 | 2,387 | |
| 1944 | R | 883 | 1,459 | 2,354 | |
| 1940 | R | 1,140 | 1,571 | 2,728 | |
| 1936 | D | 1,783 | 1,012 | 2,811 | |
| 1932 | D | 1,751 | 918 | 2,719 | |
| 1928 | R | 982 | 1,359 | 2,354 | |
| 1924 | R | 399 | 1,121 | 1,928 | |
| 1920 | R | 395 | 1,299 | 1,731 | |
| 1916 | D | 1,094 | 867 | 2,061 | |
| 1912 | D | 449 | 160 | 1,116 | |
| 1908 | R | 458 | 617 | 1,127 | |
| 1904 | R | 264 | 526 | 865 | |
| 1900 | D | 361 | 360 | 744 | |
| 1896 | D | 340 | 256 | 599 | |
| 1892 | R | 0 | 294 | 612 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Trego County's sparse population and agricultural economy place it among the most Republican-leaning counties in Kansas, where the 2024 presidential margin reached 71 points — leaving Democrats with a negligible footprint in local contests.
The Republican margin in Trego County reached its widest at seventy-one points in 2024. The margin in 2024 was seventy-one points, in line with the county's deep historical pattern.
Trego County's loyalty is rooted in its place. Median household income of $81,528, a 95% non-Hispanic-white share, and a population of 2,777 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 Edwards County and Sumner County.
