Slight decrease attributed to routine list maintenance in latest report
The number of registered voters in Arizona has decreased by less than 1% according to the Arizona Secretary of State’s office.
Of the state’s 3,610,377 voters, 1,258,994 are Republicans, 1,090,310 are Democrats and 1,223,219 have not designated an officially recognized party preference. Libertarians and members of the Green party make up a little less than one percent of the state’s total registration.
| Date/Period | Democratic | Green | Libertarian | Republican | Other | Total |
| OCT 2017 | 1,106,675 | 7,073 | 31,941 | 1,268,748 | 1,250,879 | 3,665,316 |
| JAN 2018 | 1,096,747 | 6,938 | 31,554 | 1,262,989 | 1,235,863 | 3,634,091 |
| MAR 2018 | 1,090,310 | 6,782 | 31,072 | 1,258,994 | 1,223,219 | 3,610,377 |
| -6,437 | -156 | -482 | -3,995 | -12,644 | -23,714 |
Counts by county:
| County | Democratic | Green | Libertarian | Republican | Other (Ind) |
| Apache | 56.8% | 0.1% | 0.3% | 17.4% | 25.3% |
| Cochise | 26.9% | 0.2% | 0.8% | 38.7% | 33.5% |
| Coconino | 39.5% | 0.4% | 1.0% | 25.5% | 33.6% |
| Gila | 29.6% | 0.1% | 0.6% | 42.1% | 27.7% |
| Graham | 29.6% | 0.1% | 0.4% | 45.3% | 24.6% |
| Greenlee | 41.1% | 0.1% | 0.7% | 29.6% | 28.5% |
| La Paz | 23.0% | 0.2% | 0.4% | 39.5% | 36.9% |
| Maricopa | 28.6% | 0.2% | 0.9% | 35.7% | 34.6% |
| Mohave | 17.1% | 0.1% | 0.6% | 44.9% | 37.3% |
| Navajo | 38.9% | 0.1% | 0.6% | 32.7% | 27.6% |
| Pima | 37.9% | 0.3% | 0.8% | 30.4% | 30.6% |
| Pinal | 26.4% | 0.1% | 0.8% | 34.7% | 37.9% |
| Santa Cruz | 50.5% | 0.2% | 0.6% | 16.0% | 32.8% |
| Yavapai | 20.3% | 0.2% | 0.8% | 45.8% | 32.9% |
| Yuma | 33.9% | 0.1% | 0.7% | 28.5% | 36.9% |
| Totals: | 30.2% | 0.2% | 0.9% | 34.9% | 33.9% |