Karnes City is a city in Karnes County, Texas, home to about 3,605 people across 2.3 square miles. Its ZIP code is 78118.
Mostly Karnes City
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| Nearest major airport | San Antonio International Airport (SAT)56 miles away |
|---|---|
| Nearest city of 250,000+ | San Antonio, TX55 miles away |
Straight-line distances from the center of Karnes City; 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.
Karnes City had 3,111 residents in the 2020 census, down 10% since 2000.
It’s the 519th largest of 1,778 towns in Texas by population.
Karnes County grew from 8,681 residents in 1900 to 14,710 in 2020.
Karnes County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 98°F in summer, and winter lows average 39°F. About 31.7 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Floresville, TX weather station (23 miles away).
5,230 jobs at 328 businesses in Karnes County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
13 doctors and other health care providers list an office in Karnes City.
Nearest hospitals
Providers with an office here
| Primary care doctors | 2 |
|---|---|
| Dentists | 4 |
| Nurse practitioners and physician assistants | 4 |
| Mental health providers | 2 |
| Chiropractors | 1 |
| Pharmacies | 1 |
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 (3 nearby)
Grocery stores
Libraries (1 nearby)
Theaters and performance venues
Counts are within about 1 mile 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.
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 Karnes City ISD. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Karnes City PriKarnes City | Pre-K–1 | 206 | Public | 0.6 mi |
| Karnes City ElKarnes City | 2–5 | 296 | Public | 0.5 mi |
| Karnes City J HKarnes City | 6–8 | 234 | Public | 1.0 mi |
| Karnes City H SKarnes City | 9–12 | 281 | Public | 1.0 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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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.