This is an interesting correlation between the intelligence of voters in the 2000 election and the candidate they voted for. This is sourced from here, and have some additional information to back up the claims and data.
| State | Avg. IQ | 2004 | |
| 1 | Connecticut | 113 | Kerry |
| 2 | Massachusetts | 111 | Kerry |
| 3 | New Jersey | 111 | Kerry |
| 4 | New York | 109 | Kerry |
| 5 | Rhode Island | 107 | Kerry |
| 6 | Hawaii | 106 | Kerry |
| 7 | Maryland | 105 | Kerry |
| 8 | New Hampshire | 105 | Kerry |
| 9 | Illinois | 104 | Kerry |
| 10 | Delaware | 103 | Kerry |
| 11 | Minnesota | 102 | Kerry |
| 12 | Vermont | 102 | Kerry |
| 13 | Washington | 102 | Kerry |
| 14 | California | 101 | Kerry |
| 15 | Pennsylvania | 101 | Kerry |
| 16 | Maine | 100 | Kerry |
| 17 | Virginia | 100 | Bush |
| 18 | Wisconsin | 100 | Kerry |
| 19 | Colorado | 99 | Bush |
| 20 | Iowa | 99 | Bush |
| 21 | Michigan | 99 | Kerry |
| 22 | Nevada | 99 | Bush |
| 23 | Ohio | 99 | Bush |
| 24 | Oregon | 99 | Kerry |
| 25 | Alaska | 98 | Bush |
| 26 | Florida | 98 | Bush |
| 27 | Missouri | 98 | Bush |
| 28 | Kansas | 96 | Bush |
| 29 | Nebraska | 95 | Bush |
| 30 | Arizona | 94 | Bush |
| 31 | Indiana | 94 | Bush |
| 32 | Tennessee | 94 | Bush |
| 33 | North Carolina | 93 | Bush |
| 34 | West Virginia | 93 | Bush |
| 35 | Arkansas | 92 | Bush |
| 36 | Georgia | 92 | Bush |
| 37 | Kentucky | 92 | Bush |
| 38 | New Mexico | 92 | Bush |
| 39 | North Dakota | 92 | Bush |
| 40 | Texas | 92 | Bush |
| 41 | Alabama | 90 | Bush |
| 42 | Louisiana | 90 | Bush |
| 43 | Montana | 90 | Bush |
| 44 | Oklahoma | 90 | Bush |
| 45 | South Dakota | 90 | Bush |
| 46 | South Carolina | 89 | Bush |
| 47 | Wyoming | 89 | Bush |
| 48 | Idaho | 87 | Bush |
| 49 | Utah | 87 | Bush |
| 50 | Mississippi | 85 | Bush |