| President Republican - District 18 | 100.% ( 435 of 435 ) precincts reporting as of Mar 4, 2008, at 9:49 a.m. County Returns Other Contests | | Districtwide Results | |
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| | Mike Huckabee (Rep) | 5,621 | 16.3 % |   |
| | Duncan Hunter (Rep) | 95 | 0.2 % |   |
| | Alan Keyes (Rep) | 217 | 0.6 % |   |
| | Sam Brownback (Rep) | 37 | 0.1 % |   |
| | John H. Cox (Rep) | 109 | 0.3 % |   |
| | Rudy Giuliani (Rep) | 1,482 | 4.3 % |   |
| | John McCain (Rep) | 14,101 | 40.7 % |   |
| | Ron Paul (Rep) | 1,184 | 3.4 % |   |
| | Mitt Romney (Rep) | 11,005 | 31.8 % |   |
| | Tom Tancredo (Rep) | 42 | 0.1 % |   |
| | Fred Thompson (Rep) | 790 | 2.2 % |   |
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