| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 33,839 | 24,893 | 59,477 | |
| 2020 | D | 29,794 | 23,869 | 54,239 | |
| 2016 | D | 21,943 | 20,913 | 44,238 | |
| 2012 | D | 21,851 | 20,982 | 43,309 | |
| 2008 | D | 20,827 | 20,337 | 41,435 | |
| 2004 | R | 10,939 | 18,095 | 29,191 | |
| 2000 | R | 6,703 | 11,127 | 18,375 | |
| 1996 | R | 6,759 | 7,274 | 15,443 | |
| 1992 | D | 5,811 | 5,804 | 13,659 | |
| 1988 | R | 3,111 | 5,809 | 8,969 | |
| 1984 | R | 3,389 | 5,810 | 9,199 | |
| 1980 | D | 5,611 | 3,206 | 9,056 | |
| 1976 | D | 6,294 | 2,137 | 8,431 | |
| 1972 | R | 1,380 | 4,647 | 6,027 | |
| 1968 | D | 1,996 | 1,660 | 6,675 | |
| 1964 | D | 3,620 | 2,678 | 6,298 | |
| 1960 | D | 3,185 | 708 | 3,893 | |
| 1956 | D | 3,232 | 532 | 3,764 | |
| 1952 | D | 3,529 | 431 | 3,960 | |
| 1948 | D | 2,113 | 243 | 2,500 | |
| 1944 | D | 2,022 | 123 | 2,145 | |
| 1940 | D | 1,512 | 95 | 1,611 | |
| 1936 | D | 1,994 | 123 | 2,126 | |
| 1932 | D | 1,672 | 45 | 1,727 | |
| 1928 | D | 873 | 698 | 1,571 | |
| 1924 | D | 716 | 139 | 950 | |
| 1920 | D | 753 | 349 | 1,102 | |
| 1916 | D | 943 | 102 | 1,084 | |
| 1912 | D | 840 | 57 | 941 | |
| 1908 | D | 643 | 303 | 1,005 | |
| 1904 | D | 928 | 354 | 1,362 | |
| 1900 | D | 790 | 294 | 1,107 | |
| 1896 | D | 973 | 580 | 1,609 | |
| 1892 | D | 1,005 | 611 | 1,678 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Newton County, anchored by Covington southeast of Atlanta, has tracked the broader metro exurban realignment: a county that voted Republican as recently as 2012 now tilts Democratic by 15 points, driven by rapid population growth and changing suburban demographics.
The county's recent history is a story of close margins. The Democratic margin reached ninety-four points in 1932; the Republican margin reached fifty-four points in 1972. Most other elections have been decided by single-digit points.
Newton County's demographics — a population of 118,152, a 40% non-Hispanic-white share, a median household income of $77,179 — 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 Montgomery County and Oktibbeha County.
