| Grayslake to Cullman (Alabama) | 567.69 mi (913.61 km) |
| Grayslake to Culpeper (Virginia) | 591.22 mi (951.48 km) |
| Grayslake to Culver City (California) | 1,735.87 mi (2,793.61 km) |
| Grayslake to Cumberland (Maryland) | 517.81 mi (833.33 km) |
| Grayslake to Cupertino (California) | 1,825.19 mi (2,937.36 km) |
| Grayslake to Cutler Bay (Florida) | 1,238.09 mi (1,992.51 km) |
| Grayslake to Cutlerville (Michigan) | 124.93 mi (201.05 km) |
| Grayslake to Cuyahoga Falls (Ohio) | 345.32 mi (555.75 km) |
| Grayslake to Cypress (California) | 1,724.07 mi (2,774.63 km) |
| Grayslake to Cypress Gardens (Florida) | 1,052.65 mi (1,694.08 km) |
| Grayslake to Cypress Lake (Florida) | 1,145.52 mi (1,843.53 km) |
| Grayslake to D'Iberville (Mississippi) | 821.51 mi (1,322.10 km) |
| Grayslake to Dakota Ridge (Colorado) | 909.92 mi (1,464.38 km) |
| Grayslake to Dale City (Virginia) | 616.24 mi (991.75 km) |
| Grayslake to Dallas (Georgia) | 607.31 mi (977.37 km) |
