| Mason City to Hutchinson (Kansas) | 429.10 mi (690.57 km) |
| Mason City to Hutchinson (Minnesota) | 133.49 mi (214.83 km) |
| Mason City to Hutto (Texas) | 903.36 mi (1,453.82 km) |
| Mason City to Hyattsville (Maryland) | 892.73 mi (1,436.70 km) |
| Mason City to Hybla Valley (Virginia) | 892.62 mi (1,436.53 km) |
| Mason City to Idaho Falls (Idaho) | 945.17 mi (1,521.10 km) |
| Mason City to Idylwood (Virginia) | 882.49 mi (1,420.22 km) |
| Mason City to Ilchester (Maryland) | 894.80 mi (1,440.04 km) |
| Mason City to Immokalee (Florida) | 1,331.63 mi (2,143.05 km) |
| Mason City to Imperial (California) | 1,404.58 mi (2,260.45 km) |
| Mason City to Imperial Beach (California) | 1,487.84 mi (2,394.45 km) |
| Mason City to Independence (Kentucky) | 535.56 mi (861.90 km) |
| Mason City to Independence (Missouri) | 286.94 mi (461.78 km) |
| Mason City to Indian Trail (North Carolina) | 872.72 mi (1,404.51 km) |
| Mason City to Indiana (Pennsylvania) | 742.25 mi (1,194.53 km) |
