| Quincy to Castle Pines (Colorado) | 1,767.80 mi (2,845.00 km) |
| Quincy to Castle Rock (Colorado) | 1,768.71 mi (2,846.46 km) |
| Quincy to Castro Valley (California) | 2,680.18 mi (4,313.33 km) |
| Quincy to Catalina Foothills (Arizona) | 2,273.72 mi (3,659.20 km) |
| Quincy to Cataño (Puerto Rico) | 1,670.05 mi (2,687.69 km) |
| Quincy to Cathedral City (California) | 2,509.22 mi (4,038.20 km) |
| Quincy to Catonsville (Maryland) | 363.60 mi (585.15 km) |
| Quincy to Cave Spring (Virginia) | 589.90 mi (949.36 km) |
| Quincy to Cayce (South Carolina) | 790.29 mi (1,271.84 km) |
| Quincy to Cayey (Puerto Rico) | 1,691.89 mi (2,722.83 km) |
| Quincy to Cedar City (Utah) | 2,227.49 mi (3,584.80 km) |
| Quincy to Cedar Falls (Iowa) | 1,091.15 mi (1,756.04 km) |
| Quincy to Cedar Hill (Texas) | 1,564.16 mi (2,517.28 km) |
| Quincy to Cedar Lake (Indiana) | 846.50 mi (1,362.31 km) |
| Quincy to Cedar Mill (Oregon) | 2,543.28 mi (4,093.02 km) |
