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US ZIP Code Profile

ZIP Code 77979
Port Lavaca, Texas

ZIP code 77979 is in Port Lavaca, located in Calhoun County, Texas, within the Port Lavaca metro area. Its 2020 Census population was 16,782. The estimated median adjusted gross income per tax return is $44,181, and about 4% of filers report $200,000 or more.

2020 Population
16,782
Census ZCTA
County
Calhoun
FIPS 48057
Median income (est.)
$44,181
IRS SOI 2022
Land Area
341.071 mi²
+ 131.888 mi² water

01Location & Geography

Authoritative geographic identifiers from the U.S. Census Bureau, ANSI, and FIPS standards.

Primary CityPort Lavaca, TX
CountyCalhoun County (FIPS 48057)
StateTexas (FIPS 48)
Metro Area (MSA)Port Lavaca, TX Micro Area (38920)
Census Region / DivisionSouth Region · West South Central Division
Coordinates28.608004, -96.61853
Land / Water Area341.071 mi² land · 131.888 mi² water

02Income & Economics

Distribution of the 7,350 individual tax returns filed in 77979 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
31.8%
$25K–$50K
23.7%
$50K–$75K
15.5%
$75K–$100K
9.2%
$100K–$200K
15.8%
$200K+
4.0%
The $200,000+ bracket accounts for 21% of 77979's total adjusted gross income, from 4% of returns — a concentration that drives the gap between the median ($44,181) and the average.
Estimated median = median adjusted gross income per tax return, interpolated from IRS SOI brackets. Differs from U.S. Census household income.

03Income Over Time

Year-over-year change in 77979's IRS income metrics, 2020–2022.

Median income (2021→2022)
$44,181
▲ 5.8%
Filers earning $200K+
4.0%
▲ 0.3 pt
Total filers
7,350
▲ 0.0%
GET /zipc/v2/zipcodes/77979/soi?year=… $40K 2020 $42K 2021 $44K 2022
Median = adjusted gross income per return, interpolated from IRS SOI brackets. Figures are nominal (not inflation-adjusted).

04Population Trend

Decennial U.S. Census population for the 77979 ZCTA.

2000
16,795
 
2010
17,144
▲ +2.1%
2020
16,782
▼ -2.1%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortC
USPS Finance Number487220
City AliasesClarks, Green Lake, Indianola, Kamey, Magnolia Beach, Olivia, Port Alto, Port Lavaca, Weedhaven, Long Mott

06Frequently Asked Questions

What county is ZIP code 77979 in?

ZIP code 77979 is in Calhoun County, Texas (county FIPS code 48057).

What city is ZIP code 77979?

The primary USPS city for 77979 is Port Lavaca, TX.

What metro area (MSA) is 77979 in?

77979 is part of the Port Lavaca, TX Micro Area (MSA code 38920).

What is the population of ZIP code 77979?

The 2020 Census population of 77979 was 16,782 residents.

What is the median income in ZIP code 77979?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 77979 is about $44,181, with around 4% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.