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City Profile

San Marcos, Texas

Population: 67,553 · 2 ZIP codes

Demographics

Source: U.S. Census Bureau (ACS/Decennial). Estimates vary by year.

People
Total population
67,553
People
Median age
25.5
Housing
Total households
28,013
Income
Median household income
$51,281
Housing
Total housing units
30,349
Employment
Employment rate
63.5%
Education
Bachelor’s degree or higher
38.3%
Healthcare
Insured population
83.6%
City details
Local time 00:51:28(CT)
LocationSan Marcos, TX
Population (ZIP areas)86,584(sum of local ZIP code populations)
Total ZIP codes2total
ZIP codes (by type)
1 Standard1 PO Box
CountyHays
Area code
TimezoneCentral Time (CT)
Coordinates29.8816623, -97.9847938
Land area192.4 sq miles(498,222,364 m²)

Map of San Marcos, Texas with ZIP codes

Map of San Marcos, Texas and ZIP codes

ZIP Codes in San Marcos

Explore the ZIP codes that make up San Marcos. Analyze key demographics and population stats for the region using the comprehensive table below.

ZIPType
Median incomeHousehold
Population (ZIP)
78666Standard$54,73786,584
78667PO BOX

Data unavailable or suppressed by the U.S. Census Bureau for areas with small sample sizes to protect individual privacy.

ZIP type legend

  • Standard: residential and business delivery areas
  • PO BOX: primarily post office boxes; population may be unavailable
  • Unique: high-volume organizations (universities, agencies, etc.)

Nearby cities

Other cities near San Marcos, TX.

Data Sources & Citations

The geographic and demographic information presented on this site is compiled from publicly available, authoritative sources, including:

  • United States Census BureauDemographic, population, housing, and socioeconomic data sourced from Census Bureau datasets, including the Decennial Census and the American Community Survey (ACS).Census Data
  • United States Postal Service (USPS)ZIP code classifications, delivery types, and postal designations used for reference purposes. USPS ZIP codes are intended for mail delivery and may not always align exactly with Census geographic boundaries.USPS