| San Mateo to Carlsbad (California) | 416.90 mi (670.93 km) |
| San Mateo to Carlsbad (New Mexico) | 1,081.21 mi (1,740.03 km) |
| San Mateo to Carmel (Indiana) | 1,942.34 mi (3,125.90 km) |
| San Mateo to Carmichael (California) | 91.86 mi (147.83 km) |
| San Mateo to Carney (Maryland) | 2,453.23 mi (3,948.09 km) |
| San Mateo to Carnot-Moon (Pennsylvania) | 2,246.99 mi (3,616.18 km) |
| San Mateo to Carol Stream (Illinois) | 1,828.64 mi (2,942.91 km) |
| San Mateo to Carolina (Puerto Rico) | 3,623.93 mi (5,832.15 km) |
| San Mateo to Carolina Forest (South Carolina) | 2,428.84 mi (3,908.85 km) |
| San Mateo to Carpentersville (Illinois) | 1,820.06 mi (2,929.11 km) |
| San Mateo to Carpinteria (California) | 268.42 mi (431.98 km) |
| San Mateo to Carrboro (North Carolina) | 2,374.72 mi (3,821.74 km) |
| San Mateo to Carroll (Iowa) | 1,483.04 mi (2,386.72 km) |
| San Mateo to Carrollton (Georgia) | 2,096.51 mi (3,374.01 km) |
| San Mateo to Carrollton (Texas) | 1,462.96 mi (2,354.41 km) |
