| Forest Grove to Castle Pines (Colorado) | 1,016.21 mi (1,635.43 km) |
| Forest Grove to Castle Rock (Colorado) | 1,020.01 mi (1,641.55 km) |
| Forest Grove to Castro Valley (California) | 542.69 mi (873.37 km) |
| Forest Grove to Catalina Foothills (Arizona) | 1,122.48 mi (1,806.46 km) |
| Forest Grove to Cataño (Puerto Rico) | 3,730.00 mi (6,002.85 km) |
| Forest Grove to Cathedral City (California) | 880.71 mi (1,417.37 km) |
| Forest Grove to Catonsville (Maryland) | 2,371.28 mi (3,816.21 km) |
| Forest Grove to Cave Spring (Virginia) | 2,277.84 mi (3,665.83 km) |
| Forest Grove to Cayce (South Carolina) | 2,342.97 mi (3,770.64 km) |
| Forest Grove to Cayey (Puerto Rico) | 3,744.44 mi (6,026.09 km) |
| Forest Grove to Cedar City (Utah) | 747.98 mi (1,203.75 km) |
| Forest Grove to Cedar Falls (Iowa) | 1,527.71 mi (2,458.61 km) |
| Forest Grove to Cedar Hill (Texas) | 1,652.22 mi (2,658.99 km) |
| Forest Grove to Cedar Lake (Indiana) | 1,797.04 mi (2,892.06 km) |
| Forest Grove to Cedar Mill (Oregon) | 14.98 mi (24.11 km) |
