| Mercer Island to Cibolo (Texas) | 1,783.53 mi (2,870.32 km) |
| Mercer Island to Cicero (Illinois) | 1,723.18 mi (2,773.20 km) |
| Mercer Island to Cimarron Hills (Colorado) | 1,064.42 mi (1,713.02 km) |
| Mercer Island to Cincinnati (Ohio) | 1,960.94 mi (3,155.82 km) |
| Mercer Island to Cinco Ranch (Texas) | 1,869.38 mi (3,008.47 km) |
| Mercer Island to Circleville (Ohio) | 2,018.48 mi (3,248.42 km) |
| Mercer Island to Citrus (California) | 956.23 mi (1,538.90 km) |
| Mercer Island to Citrus Heights (California) | 614.78 mi (989.39 km) |
| Mercer Island to Citrus Park (Florida) | 2,510.30 mi (4,039.94 km) |
| Mercer Island to Claiborne (Louisiana) | 1,879.30 mi (3,024.43 km) |
| Mercer Island to Claremont (California) | 957.72 mi (1,541.31 km) |
| Mercer Island to Claremont (New Hampshire) | 2,392.73 mi (3,850.73 km) |
| Mercer Island to Claremore (Oklahoma) | 1,562.26 mi (2,514.21 km) |
| Mercer Island to Clarksburg (Maryland) | 2,295.49 mi (3,694.24 km) |
| Mercer Island to Clarksburg (West Virginia) | 2,150.91 mi (3,461.56 km) |
