| Round Lake Beach to Crawfordsville (Indiana) | 172.74 mi (278.00 km) |
| Round Lake Beach to Crest Hill (Illinois) | 55.77 mi (89.75 km) |
| Round Lake Beach to Crestview (Florida) | 807.93 mi (1,300.23 km) |
| Round Lake Beach to Crestwood (Illinois) | 53.64 mi (86.32 km) |
| Round Lake Beach to Crestwood (Missouri) | 290.35 mi (467.28 km) |
| Round Lake Beach to Creve Coeur (Missouri) | 285.19 mi (458.96 km) |
| Round Lake Beach to Crofton (Maryland) | 640.24 mi (1,030.37 km) |
| Round Lake Beach to Crossville (Tennessee) | 473.07 mi (761.34 km) |
| Round Lake Beach to Crowley (Louisiana) | 873.32 mi (1,405.47 km) |
| Round Lake Beach to Crowley (Texas) | 845.81 mi (1,361.19 km) |
| Round Lake Beach to Crown Point (Indiana) | 76.64 mi (123.34 km) |
| Round Lake Beach to Crystal (Minnesota) | 321.22 mi (516.96 km) |
| Round Lake Beach to Crystal Lake (Illinois) | 16.43 mi (26.44 km) |
| Round Lake Beach to Cudahy (California) | 1,724.57 mi (2,775.42 km) |
| Round Lake Beach to Cudahy (Wisconsin) | 40.74 mi (65.56 km) |
