San Marcos is a city in Hays County, Texas, home to about 70,897 people across 36 square miles. Its ZIP codes are 78656 and 78666.
Homes sold for a median of $159 per square foot across 2 ZIP codes in the three months ending August 2026, and 0 of 2 were seller’s markets.
Mostly San Marcos
Mostly San Marcos; also Kyle and Redwood
Each card is that ZIP code’s whole market, including any part outside San Marcos. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up San Marcos’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Austin Bergstrom International Airport (AUS)27 miles away |
|---|---|
| Nearest city of 250,000+ | Austin, TX31 miles away |
| Nearest city of 1 million+ | San Antonio, TX46 miles away |
Straight-line distances from the center of San Marcos; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
San Marcos had 67,553 residents in the 2020 census, up 94% since 2000.
It’s the 59th largest of 1,778 towns in Texas by population.
Hays County grew from 14,142 residents in 1900 to 241,067 in 2020.
Hays County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 97°F in summer, and winter lows average 39°F. About 36.5 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, San Marcos, TX weather station (about a mile away).
76,995 jobs at 5,891 businesses in Hays County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
618 doctors and other health care providers list an office in San Marcos’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 56 |
|---|---|
| Specialist doctors | 86 |
| Dentists | 46 |
| Nurse practitioners and physician assistants | 110 |
| Mental health providers | 185 |
| Physical and occupational therapists | 106 |
| Optometrists | 15 |
| Chiropractors | 14 |
| Pharmacies | 19 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (31 nearby)
Grocery stores (3 nearby)
Pharmacies (7 nearby)
Libraries (2 nearby)
Museums (7 nearby)
Theaters and performance venues (2 nearby)
Counts are within about 4 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Established in 1808.
Colleges and universities
Notable people born here
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Hays CISD, San Marcos CISD, Ki Charter and others. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Blanco Vista ElSan Marcos | Pre-K–5 | 787 | Public | 5.2 mi |
| Bonham Pre-K SchoolSan Marcos | Pre-K | 380 | Public | 1.2 mi |
| Bowie ElSan Marcos | K–5 | 580 | Public | 4.0 mi |
| Crockett ElSan Marcos | K–5 | 477 | Public | 2.0 mi |
| Dezavala ElSan Marcos | K–5 | 584 | Public | 1.5 mi |
| Hernandez ElSan Marcos | K–5 | 577 | Public | 2.5 mi |
| Mendez ElSan Marcos | K–5 | 533 | Public | 1.8 mi |
| Rodriguez ElSan Marcos | K–5 | 445 | Public | 6.3 mi |
| Travis ElSan Marcos | K–5 | 440 | Public | 1.4 mi |
| Ki Charter AcademySan Marcos | 1–12 | 185 | Charter, Alternative Education | 1.5 mi |
| Goodnight MiddleSan Marcos | 6–8 | 884 | Public | 1.4 mi |
| Hays Inspire AcademySan Marcos | 6–12 | 24 | Charter, Alternative Education | 3.3 mi |
| Miller MiddleSan Marcos | 6–8 | 896 | Public | 2.9 mi |
| Lamar - Phoenix Alternative EducationSan Marcos | 9–12 | 55 | Alternative Education | 1.5 mi |
| San Marcos H SSan Marcos | 9–12 | 2,371 | Public | 4.0 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Hill Country Christian School of San MarcosSan Marcos | Pre-K–12 | 211 | Christian (no specific denomination) | 1.5 mi |
| Paloma Montessori SchoolSan Marcos | Pre-K–1 | 32 | Nonsectarian | 3.8 mi |
| San Marcos Baptist AcademySan Marcos | Pre-K–12 | 318 | Baptist | 4.5 mi |
| Seventh Adventist Jr. AcademySan Marcos | Pre-K–10 | 47 | Seventh-day Adventist | 2.2 mi |
| Wonderland SchoolSan Marcos | Pre-K–5 | 44 | Christian (no specific denomination) | 3.0 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Kyle and Redwood.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.