| Iowa City to Marysville (California) | 1,582.58 mi (2,546.92 km) |
| Iowa City to Marysville (Ohio) | 437.52 mi (704.13 km) |
| Iowa City to Marysville (Washington) | 1,552.39 mi (2,498.33 km) |
| Iowa City to Maryville (Missouri) | 196.36 mi (316.00 km) |
| Iowa City to Maryville (Tennessee) | 576.16 mi (927.25 km) |
| Iowa City to Mason (Ohio) | 411.42 mi (662.12 km) |
| Iowa City to Mason City (Iowa) | 133.76 mi (215.26 km) |
| Iowa City to Massapequa (New York) | 940.17 mi (1,513.05 km) |
| Iowa City to Massapequa Park (New York) | 941.08 mi (1,514.52 km) |
| Iowa City to Massillon (Ohio) | 523.14 mi (841.92 km) |
| Iowa City to Mastic (New York) | 970.61 mi (1,562.04 km) |
| Iowa City to Mastic Beach (New York) | 971.68 mi (1,563.76 km) |
| Iowa City to Matteson (Illinois) | 195.78 mi (315.08 km) |
| Iowa City to Matthews (North Carolina) | 738.84 mi (1,189.04 km) |
| Iowa City to Mattoon (Illinois) | 224.26 mi (360.91 km) |
