Ciudad Valles
| Ciudad Valles | |
|---|---|
| City and municipality | |
| Parroquia Santiago Apóstol | |
| Coordinates: 21°59′0″N 99°1′0″W / 21.98333°N 99.01667°W | |
| Country | Mexico | 
| State | San Luis Potosí | 
| Area | |
|  • Municipality | 2,424 km2 (936 sq mi) | 
| • City | 36.15 km2 (13.96 sq mi) | 
| Population  (2020 census) | |
|  • Municipality | 179,371 | 
| • Density | 74/km2 (190/sq mi) | 
| • City | 136,351 | 
| • City density | 3,800/km2 (9,800/sq mi) | 
| Time zone | UTC-6 (Central Standard Time) | 
| • Summer (DST) | UTC-5 (Central Daylight Time) | 
Ciudad Valles is the second-largest city in the Mexican state of San Luis Potosí. It is located in the eastern part of the state (21°59′00″N 99°1′0″W / 21.98333°N 99.01667°W), in the cultural region of Huasteca. The city is also the municipal seat of the surrounding municipality of the same name. It had a 2020 census population of 136,351.