United States presidential election in Arizona, 2008 By county By county

| County | McCain__1 | McCain__2 | Obama__3 | Obama__4 | Barr__5 | Barr__6 | Nader__7 | Nader__8 | McKinney__9 | McKinney__10 | Others__11 | Others__12 | Total_ballots | Total_eligible_registration | Voter_turnout |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| La Paz | 3509 | 61.9% | 1929 | 34.0% | 39 | 0.7% | 53 | 0.9% | 14 | 0.2% | 8 | 0.1% | 5671 | 8195 | 69.20% |
| Maricopa | 746448 | 54.0% | 602166 | 43.6% | 7605 | 0.6% | 6095 | 0.4% | 1799 | 0.1% | 849 | 0.1% | 1380571 | 1730886 | 79.76% |
| Mohave | 44333 | 64.3% | 22092 | 32.0% | 433 | 0.6% | 561 | 0.8% | 111 | 0.2% | 75 | 0.1% | 68930 | 105200 | 65.52% |
| Navajo | 19761 | 54.3% | 15579 | 42.8% | 158 | 0.4% | 182 | 0.5% | 70 | 0.2% | 50 | 0.1% | 36366 | 58528 | 62.13% |
| Pima | 182406 | 45.9% | 206254 | 51.9% | 1923 | 0.5% | 1995 | 0.5% | 683 | 0.2% | 167 | 0.0% | 397503 | 496667 | 80.03% |
| Pinal | 59421 | 56.0% | 44254 | 41.7% | 530 | 0.5% | 562 | 0.5% | 116 | 0.1% | 0 | 0.0% | 106095 | 145704 | 72.82% |
| Santa Cruz | 4518 | 33.4% | 8683 | 64.1% | 49 | 0.4% | 35 | 0.3% | 17 | 0.1% | 1 | 0.0% | 13542 | 21287 | 63.62% |