| State | County | Pop. | Density | Voted | % Dem. | % Rep. | Win |
|---|---|---|---|---|---|---|---|
| Texas | collin county | 1034730 | 474.943 | 490584 | 0.470755% | 0.514322% | Republican |
| Texas | collingsworth county | 2920 | 1.22754 | 1216 | 0.127467% | 0.861842% | Republican |
| Texas | colorado county | 21493 | 8.64172 | 9961 | 0.242947% | 0.750125% | Republican |
| Texas | comal county | 156209 | 107.795 | 88863 | 0.279374% | 0.706031% | Republican |
| Texas | comanche county | 13635 | 5.61395 | 6084 | 0.140204% | 0.85092% | Republican |
| Texas | concho county | 2726 | 1.0699 | 1268 | 0.155363% | 0.834385% | Republican |
| Texas | cooke county | 41257 | 18.2087 | 18988 | 0.169054% | 0.821361% | Republican |
| Texas | coryell county | 75951 | 27.8699 | 23490 | 0.322052% | 0.657216% | Republican |
| Texas | cottle county | 1398 | 0.59937 | 662 | 0.170695% | 0.81571% | Republican |
| Texas | crane county | 4797 | 2.3592 | 1502 | 0.160453% | 0.830226% | Republican |
| Texas | crockett county | 3464 | 0.476417 | 1574 | 0.218551% | 0.775095% | Republican |
| Texas | crosby county | 5737 | 2.46065 | 1953 | 0.269841% | 0.714798% | Republican |
| Texas | culberson county | 2171 | 0.219883 | 864 | 0.506944% | 0.480324% | Democrat |
| Texas | dallam county | 7287 | 1.87178 | 1609 | 0.122436% | 0.863269% | Republican |
| Texas | dallas county | 2635516 | 1166.81 | 918954 | 0.651367% | 0.334158% | Democrat |