| San Marcos to Effingham (Illinois) | 1,642.54 mi (2,643.41 km) |
| San Marcos to Eggertsville (New York) | 2,173.83 mi (3,498.44 km) |
| San Marcos to Egypt Lake-Leto (Florida) | 2,082.72 mi (3,351.82 km) |
| San Marcos to El Cajon (California) | 26.15 mi (42.09 km) |
| San Marcos to El Campo (Texas) | 1,262.98 mi (2,032.57 km) |
| San Marcos to El Centro (California) | 96.66 mi (155.56 km) |
| San Marcos to El Cerrito (California) | 438.52 mi (705.73 km) |
| San Marcos to El Dorado (Arkansas) | 1,414.17 mi (2,275.89 km) |
| San Marcos to El Dorado (Kansas) | 1,185.16 mi (1,907.33 km) |
| San Marcos to El Dorado Hills (California) | 439.82 mi (707.82 km) |
| San Marcos to El Mirage (Arizona) | 281.46 mi (452.96 km) |
| San Marcos to El Monte (California) | 81.41 mi (131.02 km) |
| San Marcos to El Paso (Texas) | 632.15 mi (1,017.35 km) |
| San Marcos to El Paso de Robles (California) | 263.31 mi (423.76 km) |
| San Marcos to El Reno (Oklahoma) | 1,106.60 mi (1,780.90 km) |
