San Marcos, Texas

San Marcos, Texas
Hays County Courthouse Historic District
Nickname: 
San Marvelous
Coordinates: 29°52′46″N 97°56′20″W / 29.87944°N 97.93889°W / 29.87944; -97.93889
Country United States
State Texas
CountiesHays, Caldwell, Guadalupe
Incorporated1851
Government
  TypeCouncil-Manager
Area
  Total
35.71 sq mi (92.50 km2)
  Land35.59 sq mi (92.18 km2)
  Water0.12 sq mi (0.32 km2)
Elevation
574 ft (175 m)
Population
 (2020)
  Total
67,553
  Estimate 
(2022)
70,301
  Density1,820.01/sq mi (702.70/km2)
Demonym(s)San Marcoan, San Martian
Time zoneUTC-6 (CST)
  Summer (DST)UTC-5 (CDT)
ZIP codes
78666–78667
Area code(s)512 and 737
FIPS code48-65600
GNIS feature ID2411798
Websitewww.sanmarcostx.gov

San Marcos (/ˌsæn ˈmɑːrkəs/) is a city and the county seat of Hays County, Texas, United States. The city is a part of the Greater Austin Metropolitan Area. San Marcos's limits extend into Caldwell and Guadalupe counties, as well. San Marcos is on the Interstate 35 corridor between Austin and San Antonio. Its population was 44,894 at the 2010 census and 67,553 at the 2020 census. Founded on the banks of the San Marcos River, the area is thought to be among the oldest continuously inhabited sites in the Americas. San Marcos is home to Texas State University and the Meadows Center for Water and the Environment.

In 2010, San Marcos was listed in Business Week's fourth annual survey of the "Best Places to Raise your Kids". In 2013 and 2014, the United States Census Bureau named it the fastest-growing city in the United States. In December 2013, it was named number nine on Business Insider's list of the "10 Most Exciting Small Cities In America".