| Round Lake Beach to Carlsbad (California) | 1,708.06 mi (2,748.85 km) |
| Round Lake Beach to Carlsbad (New Mexico) | 1,120.11 mi (1,802.64 km) |
| Round Lake Beach to Carmel (Indiana) | 194.80 mi (313.49 km) |
| Round Lake Beach to Carmichael (California) | 1,754.22 mi (2,823.14 km) |
| Round Lake Beach to Carney (Maryland) | 637.05 mi (1,025.24 km) |
| Round Lake Beach to Carnot-Moon (Pennsylvania) | 426.84 mi (686.94 km) |
| Round Lake Beach to Carol Stream (Illinois) | 31.95 mi (51.42 km) |
| Round Lake Beach to Carolina (Puerto Rico) | 2,102.68 mi (3,383.94 km) |
| Round Lake Beach to Carolina Forest (South Carolina) | 775.48 mi (1,248.02 km) |
| Round Lake Beach to Carpentersville (Illinois) | 20.68 mi (33.28 km) |
| Round Lake Beach to Carpinteria (California) | 1,777.56 mi (2,860.71 km) |
| Round Lake Beach to Carrboro (North Carolina) | 655.79 mi (1,055.40 km) |
| Round Lake Beach to Carroll (Iowa) | 347.64 mi (559.47 km) |
| Round Lake Beach to Carrollton (Georgia) | 629.25 mi (1,012.68 km) |
| Round Lake Beach to Carrollton (Texas) | 807.36 mi (1,299.32 km) |
