| Mercer Island to Cadillac (Michigan) | 1,767.85 mi (2,845.08 km) |
| Mercer Island to Caguas (Puerto Rico) | 3,732.51 mi (6,006.89 km) |
| Mercer Island to Cahokia (Illinois) | 1,718.38 mi (2,765.46 km) |
| Mercer Island to Calabasas (California) | 946.05 mi (1,522.53 km) |
| Mercer Island to Caldwell (Idaho) | 381.83 mi (614.50 km) |
| Mercer Island to Caledonia (Wisconsin) | 1,690.78 mi (2,721.04 km) |
| Mercer Island to Calera (Alabama) | 2,093.17 mi (3,368.63 km) |
| Mercer Island to Calexico (California) | 1,087.01 mi (1,749.37 km) |
| Mercer Island to Calhoun (Georgia) | 2,117.15 mi (3,407.22 km) |
| Mercer Island to California (Maryland) | 2,363.59 mi (3,803.83 km) |
| Mercer Island to California City (California) | 886.26 mi (1,426.30 km) |
| Mercer Island to Callaway (Florida) | 2,280.92 mi (3,670.78 km) |
| Mercer Island to Calumet City (Illinois) | 1,739.74 mi (2,799.84 km) |
| Mercer Island to Calverton (Maryland) | 2,315.96 mi (3,727.18 km) |
| Mercer Island to Camano (Washington) | 44.27 mi (71.25 km) |
