| San Marcos to Tulare (California) | 244.89 mi (394.11 km) |
| San Marcos to Tullahoma (Tennessee) | 1,767.50 mi (2,844.52 km) |
| San Marcos to Tulsa (Oklahoma) | 1,224.24 mi (1,970.22 km) |
| San Marcos to Tumwater (Washington) | 1,003.53 mi (1,615.03 km) |
| San Marcos to Tupelo (Mississippi) | 1,631.47 mi (2,625.60 km) |
| San Marcos to Turlock (California) | 366.43 mi (589.70 km) |
| San Marcos to Tuscaloosa (Alabama) | 1,708.54 mi (2,749.63 km) |
| San Marcos to Tustin (California) | 55.16 mi (88.77 km) |
| San Marcos to Twentynine Palms (California) | 94.67 mi (152.35 km) |
| San Marcos to Twin Falls (Idaho) | 668.01 mi (1,075.06 km) |
| San Marcos to Twin Rivers (New Jersey) | 2,391.48 mi (3,848.71 km) |
| San Marcos to Twinsburg (Ohio) | 2,029.49 mi (3,266.15 km) |
| San Marcos to Two Rivers (Wisconsin) | 1,756.28 mi (2,826.46 km) |
| San Marcos to Tyler (Texas) | 1,270.04 mi (2,043.94 km) |
| San Marcos to Tysons (Virginia) | 2,249.36 mi (3,620.00 km) |
