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San Marcos

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Photograph of San Marcos
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San Marcos

Total population

70,897

Median home value

$310,400

38.3%

Bachelor's+

Median income

$51,281

San Marcos$51k
National$74k
Weather67°F · Partly Sunny
Coordinates29.87°, -97.94°

Demographic figures from US Census Bureau · ACS 5-year estimates. Overview below cites Wikipedia and may reference a different year.

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Active weather alerts
  • Wind Advisory · Moderate
    Wind Advisory issued October 16 at 10:26AM CDT until October 16 at 7:00PM CDT by NWS Austin/San Antonio TX

Source: NOAA National Weather Service.

City facts

Overview

San Marcos is a city in and the county seat of Hays County, Texas, United States. The city is mostly a part of the Greater Austin metropolitan area. San Marcos's limits extend into Caldwell and Guadalupe Counties, as well. The latter is part of the Greater San Antonio Metropolitan Area. 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.

Read more on Wikipedia

History & geography

History

Archeologists have found evidence at the San Marcos River associated with the Clovis culture, which suggests that the river has been the site of human habitation for more than 10,000 years. The San Marcos Springs are the third-largest collection of springs in Texas. Never in recorded history has the river run dry. In 1689, Spaniard Alonso de León led an expedition from Mexico to explore Texas and establish missions and presidios in the region. De León's party helped blaze the Camino Real (later known as the Old San Antonio Road), which followed present-day Hunter Road, Hopkins Street, and Aquarena Springs Drive (the route later shifted four miles to the south; it is now followed by County Road 266, known locally as Old Bastrop Highway). De León's party reached the river on April 25, the feast day of St. Mark the Evangelist; the river was thus named the San Marcos. In 1803, after the Louisiana purchase, the Spanish government in Mexico became concerned about American citizens moving into Texas. Officials decided to establish more Spanish settlements between San Antonio de Béxar and Nacogdoches in an effort to secure Spanish presence in the area. The governor of the province of Texas, Manuel Antonio Cordero y Bustamante, approached his friend Felipe Roque de la Portilla to organize and oversee the venture. In 1807, after extracting promises from Cordero that he would receive a substantial land grant and that the government would assist the settlers financially, Portilla headed for Texas with a small group of settlers. The exact number has been disputed; some suggest that only 10 persons were in the original group, while other sources say the number was as high as 52. Also, some conflict exists in records as to whether Portilla's family was in the original group or…

Geography

San Marcos is in Central Texas. It is southwest of Austin and northeast of San Antonio. According to the United States Census Bureau, in 2010, it had a total area of , of which , or 0.44%, was covered by water.

Read full article on Wikipedia

Excerpted from the corresponding Wikipedia article (CC BY-SA).

Demographics & economy

Median age
25.5
Median home value
$310,400
Housing units
30,349
Poverty rate
26.9%
Unemployment
5.1%

Race & ethnicity

White
58.8%
Black
5.7%
Asian
2.2%
Hispanic
42.2%

Source: US Census Bureau — American Community Survey, 5-year estimates.

Geography

Latitude
29.8724
Longitude
-97.9360
Water area
0.13 mi²
View on OpenStreetMap

Coordinates & boundaries from the US Census TIGER/Line shapefiles.

Climate

Current forecast

Today
67°F
Partly Sunny
Tonight
50°F
Partly Cloudy
Saturday
67°F
Sunny
Saturday Night
46°F
Partly Cloudy
Sunday
71°F
Sunny
Sunday Night
50°F
Partly Cloudy

Forecast for San Marcos, TX from NOAA NWS API.

Air quality

Industrial & pollution facilities

Natural hazard risk

Health (adults)

High blood pressure
34%
Diabetes
13.4%
Adult obesity
39.3%
Binge drinking
17%
Adult smoking
14.3%
No leisure activity
29.4%

Age-adjusted prevalence estimates from CDC PLACES (latest release).

Walkability

Amenities nearby

Wildlife & biodiversity

Observations (last 5 yrs, 10 mi)
275,559
Distinct species (top 10)
10

Most-observed species

  • Northern Cardinal
    Cardinalis cardinalis (Linnaeus, 1758) · Aves
    9,702
  • Northern Mockingbird
    Mimus polyglottos (Linnaeus, 1758) · Aves
    7,281
  • Carolina Wren
    Thryothorus ludovicianus (Latham, 1790) · Aves
    6,834
  • Black Vulture
    Coragyps atratus (Bechstein, 1793) · Aves
    6,337
  • Carolina Chickadee
    Poecile carolinensis (Audubon, 1834) · Aves
    5,911
  • White-winged Dove
    Zenaida asiatica (Linnaeus, 1758) · Aves
    5,846
  • Mourning Dove
    Zenaida macroura (Linnaeus, 1758) · Aves
    5,784
  • Turkey Vulture
    Cathartes aura (Linnaeus, 1758) · Aves
    4,898

Citizen-science & research observations from the Global Biodiversity Information Facility (GBIF).

Schools

Total
22
Elementary
13
Middle
5
High
1
Other
3

Largest nearby schools

  • SAN MARCOS H S
    High · SAN MARCOS · 2,536 students · 15.6:1 ratio
  • MILLER MIDDLE
    Middle · SAN MARCOS · 986 students · 17.6:1 ratio
  • GOODNIGHT MIDDLE
    Middle · SAN MARCOS · 866 students · 14:1 ratio
  • LAURA B WALLACE MIDDLE
    Middle · KYLE · 789 students · 14.9:1 ratio
  • D J RED SIMON MIDDLE
    Middle · KYLE · 733 students · 13.6:1 ratio
  • BLANCO VISTA EL
    Elementary · SAN MARCOS · 731 students · 15.6:1 ratio
  • IDEA KYLE ACADEMY
    Elementary · KYLE · 684 students · 24.4:1 ratio
  • TOBIAS EL
    Elementary · KYLE · 683 students · 14.5:1 ratio

Public K–12 schools within ~10 mi from Urban Institute Education Data Portal (NCES Common Core of Data, 2022).

Earthquake history

Quakes ≥ 2.5 (25 yrs, 62 mi)
138
Largest magnitude
4.6
Largest event
2025-01-30

Most recent

Events from the USGS Earthquake Catalog (global) (FDSN Event Web Service).

Photos

Sights & places nearby

Notable people from here

People born within ~10 km, from Wikidata (CC0). Click any name for their Wikipedia article.

Nearby places in Texas

Browse all places in Texas →

Geography & sun

Avg solar (kWh/m²/day)
4.8
Annual solar (kWh/m²)
1,750

Elevation, sunrise/sunset and daylight from Open-Meteo. Solar climatology from NASA POWER.

Nearby airports

Public attention

Wikipedia views (last 30 days)
9,609
Avg daily Wikipedia views
320
Attention level
Modest

Pageview totals from the Wikimedia Pageviews API.

Books about San Marcos

Search results from Open Library.

Recent natural events nearby

Wildfires, storms and other events from NASA EONET (last 12 months, within 250 mi).

Ground air-quality sensors

Recently spotted species

Research-grade observations from iNaturalist (within ~15 mi).

Nearest stream gauge

Site
San Marcos Rv at San Marcos, TX
Distance
1.2 mi
Streamflow
93.5 cfs
Gage height
3.62 ft

Live readings from USGS NWIS · measured 2026-10-16 09:45 UTC.

Events

Sources

  • • Wikipedia
  • • US Census Bureau (ACS 5-year estimates)
  • • NOAA National Weather Service
  • • Wikidata
  • • USGS Earthquake Catalog (global feed)
  • • USGS NWIS (water data)
  • • NCES via Urban Institute Education Data Portal
  • • GBIF (Global Biodiversity Information Facility)
  • • iNaturalist
  • • CDC PLACES
  • • Open-Meteo / sunrise-sunset.org
  • • Wikipedia Pageviews API
  • • Open Library
  • • NASA EONET