As the map indicates, the 2004 United States presidential elections in Colorado were won by the Republican party. Republican senator, George W. Bush won 51.7% of the vote as against the Democrat John Kerry's 47%. El Paso County got the maximum votes for the Republicans, while the least number came from the county of San Juan.
The 2008 presidential elections in the state saw the Democrats winning. Democrat nominee Barack Obama got 1,216,793 votes as compared to the Republican senator, John McCain who landed with a total of 1,020,135 votes. Denver, an essentially democratic county got the maximum votes for the Democrats while the least votes came from the Kiowa county. The Democrat, John Hickenlooper was appointed the governor of the state.
Colorado Presidential Election Results 2004 Vs 2008
| COUNTY | VOTE DEM 2004 | VOTE DEM 2008 | VOTE REP 2004 | VOTE REP 2008 | Winner 2004 | Winner 2008 |
| Adams | 69122 | 93443 | 65912 | 63976 | Democrats | Democrats |
| Alamosa | 3017 | 3521 | 3179 | 2635 | Republican | Democrats |
| Arapahoe | 110262 | 148218 | 119475 | 113866 | Republican | Democrats |
| Archuleta | 2141 | 2836 | 3601 | 3638 | Republican | Republican |
| Baca | 483 | 536 | 1680 | 1572 | Republican | Republican |
| Bent | 785 | 799 | 1338 | 1077 | Republican | Republican |
| Boulder | 105564 | 124159 | 51586 | 44904 | Democrats | Democrats |
| Broomfield | 10935 | 16168 | 12007 | 12757 | Republican | Democrats |
| Chaffee | 3766 | 4861 | 4875 | 4873 | Republican | Republican |
| Cheyenne | 198 | 198 | 923 | 890 | Republican | Republican |
| Clear Creek | 2989 | 3332 | 2522 | 2300 | Democrats | Democrats |
| Conejos | 1894 | 2154 | 1864 | 1653 | Democrats | Democrats |
| Costilla | 1170 | 1245 | 566 | 415 | Democrats | Democrats |
| Crowley | 478 | 552 | 1006 | 976 | Republican | Republican |
| Custer | 739 | 912 | 1657 | 1672 | Republican | Republican |
| Delta | 4224 | 5084 | 9722 | 10067 | Republican | Republican |
| Denver | 166135 | 204882 | 69903 | 62567 | Democrats | Democrats |
| Dolores | 333 | 369 | 785 | 818 | Republican | Republican |
| Douglas | 39661 | 61960 | 80651 | 88108 | Republican | Republican |
| Eagle | 9744 | 13187 | 8533 | 8179 | Democrats | Democrats |
| El Paso | 77648 | 108899 | 161361 | 160318 | Republican | Republican |
| Elbert | 2834 | 3819 | 8389 | 9108 | Republican | Republican |
| Fremont | 5933 | 6844 | 12313 | 12668 | Republican | Republican |
| Garfield | 9228 | 11357 | 11123 | 11359 | Republican | Republican |
| Gilpin | 1807 | 1954 | 1329 | 1253 | Democrats | Democrats |
| Grand | 3243 | 4037 | 4260 | 4128 | Republican | Republican |
| Gunnison | 4782 | 5556 | 3479 | 3131 | Democrats | Democrats |
| Hinsdale | 236 | 240 | 355 | 344 | Republican | Republican |
| Huerfano | 1656 | 1989 | 1701 | 1580 | Republican | Democrats |
| Jackson | 210 | 277 | 710 | 624 | Republican | Republican |
| Jefferson | 126558 | 158153 | 140644 | 131627 | Republican | Democrats |
| Kiowa | 172 | 178 | 712 | 650 | Republican | Republican |
| Kit Carson | 729 | 912 | 2721 | 2455 | Republican | Republican |
| La Plata | 13409 | 16057 | 11704 | 11503 | Democrats | Democrats |
| Lake | 1623 | 1859 | 1261 | 1078 | Democrats | Democrats |
| Larimer | 68266 | 89822 | 75884 | 73641 | Republican | Democrats |
| Las Animas | 3300 | 3562 | 3196 | 3086 | Democrats | Democrats |
| Lincoln | 503 | 546 | 1819 | 1717 | Republican | Republican |
| Logan | 2491 | 2846 | 6168 | 6002 | Republican | Republican |
| Mesa | 19564 | 24008 | 41539 | 44578 | Republican | Republican |
| Mineral | 227 | 270 | 383 | 334 | Republican | Republican |
| Moffat | 1335 | 1582 | 4247 | 4135 | Republican | Republican |
| Montezuma | 3867 | 4661 | 6988 | 6961 | Republican | Republican |
| Montrose | 4776 | 6495 | 11218 | 12199 | Republican | Republican |
| Morgan | 3039 | 3813 | 6787 | 6272 | Republican | Republican |
| Otero | 3164 | 3546 | 4947 | 4393 | Republican | Republican |
| Ouray | 1278 | 1636 | 1402 | 1367 | Republican | Democrats |
| Park | 3445 | 4250 | 4781 | 4896 | Republican | Republican |
| Phillips | 582 | 622 | 1717 | 1612 | Republican | Republican |
| Pitkin | 6335 | 7349 | 2784 | 2484 | Democrats | Democrats |
| Prowers | 1308 | 1487 | 3392 | 3043 | Republican | Republican |
| Pueblo | 35369 | 41097 | 31117 | 30257 | Democrats | Democrats |
| Rio Blanco | 566 | 655 | 2403 | 2437 | Republican | Republican |
| Rio Grande | 2006 | 2448 | 3448 | 2930 | Republican | Republican |
| Routt | 6392 | 8270 | 5199 | 4725 | Democrats | Democrats |
| Saguache | 1594 | 1730 | 1163 | 953 | Democrats | Democrats |
| San Juan | 253 | 264 | 216 | 218 | Democrats | Democrats |
| San Miguel | 2876 | 3349 | 1079 | 933 | Democrats | Democrats |
| Sedgwick | 374 | 468 | 971 | 857 | Republican | Republican |
| Summit | 8144 | 9802 | 5370 | 4883 | Democrats | Democrats |
| Teller | 3556 | 4513 | 8094 | 8146 | Republican | Republican |
| Washington | 455 | 529 | 2050 | 1949 | Republican | Republican |
| Weld | 31868 | 47292 | 55591 | 56526 | Republican | Republican |
| Yuma | 1064 | 1117 | 3456 | 3286 | Republican | Republican |
