| Mason City to Storm Lake (Iowa) | 106.91 mi (172.06 km) |
| Mason City to Storrs (Connecticut) | 1,068.70 mi (1,719.90 km) |
| Mason City to Stoughton (Wisconsin) | 201.44 mi (324.18 km) |
| Mason City to Stow (Ohio) | 617.21 mi (993.30 km) |
| Mason City to Streamwood (Illinois) | 267.04 mi (429.76 km) |
| Mason City to Streator (Illinois) | 263.94 mi (424.77 km) |
| Mason City to Streetsboro (Ohio) | 620.40 mi (998.44 km) |
| Mason City to Strongsville (Ohio) | 594.77 mi (957.19 km) |
| Mason City to Stuart (Florida) | 1,319.42 mi (2,123.41 km) |
| Mason City to Stuarts Draft (Virginia) | 821.99 mi (1,322.87 km) |
| Mason City to Sturgis (Michigan) | 407.20 mi (655.33 km) |
| Mason City to Suamico (Wisconsin) | 275.31 mi (443.08 km) |
| Mason City to Sudley (Virginia) | 871.27 mi (1,402.17 km) |
| Mason City to Suffern (New York) | 984.39 mi (1,584.22 km) |
| Mason City to Suffolk (Virginia) | 981.87 mi (1,580.16 km) |
