Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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zipcodes.pro — STATE/TX/COUNTY/CALHOUN

Calhoun County, TX ZIP codes

Calhoun County, TX has 4 ZIP codes, in 4 towns: 77979, 77983, 77978 and 77982. 1 more crosses into it from a neighbouring county: 77990.

The county seat is Port Lavaca.

ZIP codes
4
Partly in it
1 more
Towns
4
County seat
Port Lavaca
County FIPS
48057
State
Texas
Population
19,868
Median household income
$79,959
Land area
507 sq mi
Metro area
Port Lavaca

Calhoun County ZIP codes by town

Port Lavaca (county seat)
77979

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

ZIP codes partly in Calhoun County

This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of Calhoun County.

Map of Calhoun County ZIP codes

77978779797798277983

The ZIP codes of Calhoun County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Calhoun County in numbers

About 19,868 people live in Calhoun County, in 8,670 households, the 124th most populous of Texas's 254 counties. The median household income is $79,959 a year, about the same as the Texas median of $78,476 (US: $80,734). The median owner-occupied home is valued at $171,200 (40% below the Texas median), and median gross rent is $891 a month. The median age is 41.4; 20.1% of adults 25 and over hold a bachelor's degree or higher (33.8% across Texas); the average commute takes 19 minutes.

Population19,868Calhoun19,868
Households8,670Calhoun8,670
Median age41.4Calhoun41.4Texas35.6US 38.9
Median household income$79,959Calhoun$79,959Texas$78,476US $80,734
Median home value$171,200Calhoun$171,200Texas$283,800US $332,700
Median gross rent$891Calhoun$891Texas$1,403US $1,413
Bachelor's degree or higher20.1%Calhoun20.1%Texas33.8%US 35.7%
Mean commute19.4 minCalhoun19.4 minTexas26.7 minUS 26.4 min
Population density39 / sq miCalhoun39 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Calhoun County

Largest towns in Calhoun County
TownZIP codesPopulation
Port Lavaca 1 11,358
Seadrift 1 1,239
Port O Connor 1 620
Point Comfort 1 304

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Calhoun County.

Not sure you are in Calhoun County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Calhoun County, with figures

ZIP codes in Calhoun County
ZIP City Type Population Median income Median home
77978 Point Comfort , TX Standard 304 $142,500 $251,600
77979 Port Lavaca , TX Standard 16,488 $77,039 $156,200
77982 Port O Connor , TX Standard 620 $95,593 $415,300
77983 Seadrift , TX Standard 2,529 $97,850 $292,000

Cite this page

zipcodes.pro. “Calhoun County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/tx/county/calhoun

Underlying data is public domain or openly licensed — sources, vintages and licences.