| San Mateo to Mendota (California) | 119.91 mi (192.97 km) |
| San Mateo to Mendota Heights (Minnesota) | 1,588.42 mi (2,556.31 km) |
| San Mateo to Menifee (California) | 392.43 mi (631.56 km) |
| San Mateo to Menlo Park (California) | 9.82 mi (15.80 km) |
| San Mateo to Menomonee Falls (Wisconsin) | 1,827.95 mi (2,941.80 km) |
| San Mateo to Menomonie (Wisconsin) | 1,648.23 mi (2,652.57 km) |
| San Mateo to Mentor (Ohio) | 2,178.73 mi (3,506.32 km) |
| San Mateo to Mequon (Wisconsin) | 1,834.99 mi (2,953.14 km) |
| San Mateo to Merced (California) | 102.07 mi (164.26 km) |
| San Mateo to Mercedes (Texas) | 1,627.08 mi (2,618.53 km) |
| San Mateo to Mercer Island (Washington) | 691.91 mi (1,113.51 km) |
| San Mateo to Mercerville (New Jersey) | 2,536.71 mi (4,082.44 km) |
| San Mateo to Meriden (Connecticut) | 2,616.50 mi (4,210.85 km) |
| San Mateo to Meridian (Idaho) | 520.84 mi (838.22 km) |
| San Mateo to Meridian (Mississippi) | 1,926.30 mi (3,100.08 km) |
