| San Marcos to Stephenville (Texas) | 1,102.67 mi (1,774.57 km) |
| San Marcos to Sterling (Colorado) | 928.06 mi (1,493.57 km) |
| San Marcos to Sterling (Illinois) | 1,612.73 mi (2,595.45 km) |
| San Marcos to Sterling (Virginia) | 2,239.60 mi (3,604.28 km) |
| San Marcos to Sterling Heights (Michigan) | 1,957.98 mi (3,151.06 km) |
| San Marcos to Steubenville (Ohio) | 2,067.02 mi (3,326.54 km) |
| San Marcos to Stevens Point (Wisconsin) | 1,670.74 mi (2,688.80 km) |
| San Marcos to Stevenson Ranch (California) | 118.78 mi (191.15 km) |
| San Marcos to Stillwater (Minnesota) | 1,534.21 mi (2,469.07 km) |
| San Marcos to Stillwater (Oklahoma) | 1,159.12 mi (1,865.42 km) |
| San Marcos to Stockbridge (Georgia) | 1,893.96 mi (3,048.03 km) |
| San Marcos to Stockton (California) | 407.28 mi (655.45 km) |
| San Marcos to Stone Ridge (Virginia) | 2,231.70 mi (3,591.57 km) |
| San Marcos to Stonecrest (Georgia) | 1,897.63 mi (3,053.94 km) |
| San Marcos to Stony Brook (New York) | 2,461.53 mi (3,961.45 km) |
