| ZIP Codes: | 4 ZIP Codes (2 Standard, 2 PO Box, 0 Unique) [See All] |
| Area Code: | 361 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:13:51 PM |
| Population: | 19,941 [See All] |
| FIPS: | 48057 |
| CBSA: | Port Lavaca, TX |
| Land Area: | 529 sq mi |
| Water Area: | 289 sq mi |
| Coordinates: | 28.5261, -96.6057 |
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19,941 residents live across 4 ZIPs covering 529 sq mi, served by 4 distinct USPS-recognized cities.
Population moved from 21,526 to 19,941 from 2014 to 2024 — a -7.4% change. 1 ZIPs gained residents, 3 lost.
The county's wealthiest ZIP 77978 (Point Comfort, $142,500 median) and poorest ZIP 77979 (Port Lavaca, $77,039) are 13.1 miles apart — a 1.8× income gap across local geography.
Median home values vary 2.7× across this county — from $156,200 in 77979 (Port Lavaca) to $415,300 in 77982 (Port O Connor).
Density varies 339× across the county — from 13 people/sq mi in 77982 (Port O Connor) to 4,380 in 77978 (Point Comfort).
Educational attainment ranges from 15.0% bachelor's+ in 77983 (Seadrift) to 41.5% in 77982 (Port O Connor) — the breadth of educational profiles across the area.
Within Texas, this is the #120 most populous of 254 counties and ranks #12 for median household income .
Weighted by population, the typical household earns about $81,253 across the county — reflecting what a typical resident sees, not a simple ZIP average.
20.2% of adults age 25+ hold a bachelor's degree or higher (2,791 of 13,848 reporting).
2 Standard delivery, 2 PO Box only, 0 single-entity Unique ZIPs serve this county.
A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.
One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.
Calhoun County lost 7.4% of residents between 2014 and 2024. ZIPs that shed the largest share: