| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 3,522 | 2,294 | 6,064 | |
| 2020 | D | 4,013 | 2,513 | 6,738 | |
| 2016 | D | 2,773 | 2,111 | 5,281 | |
| 2012 | D | 2,733 | 2,285 | 5,181 | |
| 2008 | D | 3,093 | 2,354 | 5,571 | |
| 2004 | D | 2,628 | 2,621 | 5,338 | |
| 2000 | R | 1,788 | 2,296 | 4,371 | |
| 1996 | R | 1,580 | 1,882 | 4,091 | |
| 1992 | R | 1,489 | 1,570 | 4,355 | |
| 1988 | R | 1,284 | 2,177 | 3,547 | |
| 1984 | R | 962 | 2,659 | 3,677 | |
| 1980 | R | 865 | 2,132 | 3,421 | |
| 1976 | R | 1,025 | 1,600 | 2,721 | |
| 1972 | R | 828 | 1,872 | 2,799 | |
| 1968 | R | 465 | 1,130 | 1,758 | |
| 1964 | R | 666 | 850 | 1,516 | |
| 1960 | R | 457 | 912 | 1,375 | |
| 1956 | R | 237 | 673 | 912 | |
| 1952 | R | 220 | 754 | 982 | |
| 1948 | R | 255 | 541 | 835 | |
| 1944 | R | 242 | 378 | 621 | |
| 1940 | D | 523 | 459 | 995 | |
| 1936 | D | 458 | 241 | 707 | |
| 1932 | D | 374 | 199 | 581 | |
| 1928 | R | 127 | 220 | 356 | |
| 1924 | R | 45 | 166 | 310 | |
| 1920 | R | 56 | 170 | 251 | |
| 1916 | D | 158 | 137 | 326 | |
| 1912 | D | 182 | 0 | 369 | |
| 1908 | R | 121 | 224 | 374 | |
| 1904 | R | 82 | 245 | 379 | |
| 1900 | R | 258 | 284 | 545 | |
| 1896 | D | 315 | 259 | 585 | |
| 1892 | R | 166 | 286 | 536 | |
| 1888 | R | 215 | 347 | 581 | |
| 1884 | R | 381 | 598 | 1,021 | |
| 1880 | R | 821 | 913 | 1,772 | |
| 1876 | R | 125 | 153 | 278 |
Mono County's economy revolves around tourism, recreation, and a large seasonal workforce tied to Eastern Sierra resorts — a demographic mix that pushes it notably leftward compared to most low-density California counties.
The 2004 election was the turning point, when the Democratic candidate carried the county by zero points. The 2024 margin was twenty points, in line with the county's new direction.
The demographics suggest why. A population of 13,148, a 71% non-Hispanic-white share, and a median household income of $99,415 situate the county in the broader realignment patterns of recent cycles. The county's voting pattern over the last decade is most similar to that of Arapahoe County and Jefferson County.
