| Mason City to Carlsbad (California) | 1,473.27 mi (2,371.00 km) |
| Mason City to Carlsbad (New Mexico) | 954.72 mi (1,536.48 km) |
| Mason City to Carmel (Indiana) | 425.68 mi (685.06 km) |
| Mason City to Carmichael (California) | 1,494.42 mi (2,405.04 km) |
| Mason City to Carney (Maryland) | 901.96 mi (1,451.57 km) |
| Mason City to Carnot-Moon (Pennsylvania) | 691.77 mi (1,113.29 km) |
| Mason City to Carol Stream (Illinois) | 271.67 mi (437.22 km) |
| Mason City to Carolina (Puerto Rico) | 2,331.50 mi (3,752.18 km) |
| Mason City to Carolina Forest (South Carolina) | 1,006.37 mi (1,619.60 km) |
| Mason City to Carpentersville (Illinois) | 259.41 mi (417.48 km) |
| Mason City to Carpinteria (California) | 1,532.71 mi (2,466.65 km) |
| Mason City to Carrboro (North Carolina) | 900.58 mi (1,449.35 km) |
| Mason City to Carroll (Iowa) | 112.80 mi (181.53 km) |
| Mason City to Carrollton (Georgia) | 792.98 mi (1,276.18 km) |
| Mason City to Carrollton (Texas) | 730.04 mi (1,174.89 km) |
