| Iowa City to Castle Pines (Colorado) | 715.69 mi (1,151.79 km) |
| Iowa City to Castle Rock (Colorado) | 716.53 mi (1,153.14 km) |
| Iowa City to Castro Valley (California) | 1,637.45 mi (2,635.22 km) |
| Iowa City to Catalina Foothills (Arizona) | 1,244.08 mi (2,002.15 km) |
| Iowa City to Cataño (Puerto Rico) | 2,192.11 mi (3,527.85 km) |
| Iowa City to Cathedral City (California) | 1,458.93 mi (2,347.92 km) |
| Iowa City to Catonsville (Maryland) | 793.70 mi (1,277.33 km) |
| Iowa City to Cave Spring (Virginia) | 686.06 mi (1,104.11 km) |
| Iowa City to Cayce (South Carolina) | 780.93 mi (1,256.79 km) |
| Iowa City to Cayey (Puerto Rico) | 2,209.06 mi (3,555.14 km) |
| Iowa City to Cedar City (Utah) | 1,175.92 mi (1,892.46 km) |
| Iowa City to Cedar Falls (Iowa) | 76.17 mi (122.58 km) |
| Iowa City to Cedar Hill (Texas) | 694.31 mi (1,117.39 km) |
| Iowa City to Cedar Lake (Indiana) | 212.58 mi (342.12 km) |
| Iowa City to Cedar Mill (Oregon) | 1,577.20 mi (2,538.26 km) |
