| Katy to Castle Pines (Colorado) | 841.89 mi (1,354.89 km) |
| Katy to Castle Rock (Colorado) | 836.75 mi (1,346.63 km) |
| Katy to Castro Valley (California) | 1,596.47 mi (2,569.27 km) |
| Katy to Catalina Foothills (Arizona) | 906.76 mi (1,459.28 km) |
| Katy to Cataño (Puerto Rico) | 2,022.25 mi (3,254.50 km) |
| Katy to Cathedral City (California) | 1,240.71 mi (1,996.74 km) |
| Katy to Catonsville (Maryland) | 1,264.76 mi (2,035.43 km) |
| Katy to Cave Spring (Virginia) | 1,044.54 mi (1,681.03 km) |
| Katy to Cayce (South Carolina) | 913.22 mi (1,469.68 km) |
| Katy to Cayey (Puerto Rico) | 2,031.86 mi (3,269.96 km) |
| Katy to Cedar City (Utah) | 1,129.16 mi (1,817.20 km) |
| Katy to Cedar Falls (Iowa) | 899.28 mi (1,447.25 km) |
| Katy to Cedar Hill (Texas) | 203.92 mi (328.18 km) |
| Katy to Cedar Lake (Indiana) | 927.70 mi (1,492.98 km) |
| Katy to Cedar Mill (Oregon) | 1,818.02 mi (2,925.83 km) |
