| Rock Island to Mendota (California) | 1,621.73 mi (2,609.92 km) |
| Rock Island to Mendota Heights (Minnesota) | 268.60 mi (432.27 km) |
| Rock Island to Menifee (California) | 1,545.08 mi (2,486.57 km) |
| Rock Island to Menlo Park (California) | 1,697.51 mi (2,731.87 km) |
| Rock Island to Menomonee Falls (Wisconsin) | 171.02 mi (275.24 km) |
| Rock Island to Menomonie (Wisconsin) | 245.51 mi (395.11 km) |
| Rock Island to Mentor (Ohio) | 477.91 mi (769.12 km) |
| Rock Island to Mequon (Wisconsin) | 180.22 mi (290.04 km) |
| Rock Island to Merced (California) | 1,613.79 mi (2,597.15 km) |
| Rock Island to Mercedes (Texas) | 1,137.74 mi (1,831.02 km) |
| Rock Island to Mercer Island (Washington) | 1,602.79 mi (2,579.45 km) |
| Rock Island to Mercerville (New Jersey) | 833.66 mi (1,341.65 km) |
| Rock Island to Meriden (Connecticut) | 918.83 mi (1,478.71 km) |
| Rock Island to Meridian (Idaho) | 1,317.12 mi (2,119.70 km) |
| Rock Island to Meridian (Mississippi) | 636.33 mi (1,024.08 km) |
