| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 16,822 | 17,426 | 34,658 | |
| 2020 | D | 16,649 | 16,150 | 33,297 | |
| 2016 | R | 12,987 | 14,635 | 29,616 | |
| 2012 | R | 13,977 | 14,207 | 28,602 | |
| 2008 | D | 15,221 | 13,387 | 28,910 | |
| 2004 | R | 13,319 | 14,614 | 28,222 | |
| 2000 | R | 9,852 | 12,597 | 23,879 | |
| 1996 | R | 8,881 | 9,168 | 20,763 | |
| 1992 | R | 7,258 | 8,715 | 21,703 | |
| 1988 | R | 5,153 | 12,983 | 18,344 | |
| 1984 | R | 3,806 | 11,891 | 15,764 | |
| 1980 | R | 3,119 | 9,980 | 14,841 | |
| 1976 | R | 3,374 | 8,561 | 12,198 | |
| 1972 | R | 2,395 | 8,525 | 11,070 | |
| 1968 | R | 2,163 | 6,795 | 9,317 | |
| 1964 | R | 4,058 | 4,957 | 9,015 | |
| 1960 | R | 1,918 | 7,487 | 9,405 | |
| 1956 | R | 1,281 | 7,527 | 8,816 | |
| 1952 | R | 1,578 | 7,498 | 9,076 | |
| 1948 | R | 1,869 | 6,127 | 8,050 | |
| 1944 | R | 2,461 | 5,251 | 7,713 | |
| 1940 | R | 2,870 | 5,656 | 8,526 | |
| 1936 | R | 2,769 | 5,521 | 8,325 | |
| 1932 | R | 2,873 | 5,269 | 8,161 | |
| 1928 | R | 1,592 | 5,509 | 7,117 | |
| 1924 | R | 2,213 | 4,372 | 6,685 | |
| 1920 | R | 2,279 | 4,214 | 6,510 | |
| 1916 | R | 2,003 | 2,259 | 4,294 | |
| 1912 | D | 1,820 | 1,454 | 4,221 | |
| 1908 | R | 1,591 | 2,562 | 4,218 | |
| 1904 | R | 1,683 | 2,594 | 4,339 | |
| 1900 | R | 1,859 | 2,626 | 4,586 | |
| 1896 | R | 1,214 | 2,800 | 4,250 | |
| 1892 | D | 2,267 | 2,253 | 4,615 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Carroll County's economy revolves around tourism and second-home ownership along Lake Winnipesaukee, drawing a mix of year-round working residents and seasonal transplants whose competing priorities have kept presidential margins within single digits for over a decade.
The county's recent history is a story of close margins. The Democratic margin reached nine points in 1912; the Republican margin reached seventy-one points in 1956. Most other elections have been decided by single-digit points.
Carroll County's demographics — a population of 51,804, a 94% non-Hispanic-white share, a median household income of $86,463 — situate the county close to national averages on several dimensions. The county's voting pattern over the last decade is most similar to that of Warren County and Rockingham County.
