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US ZIP Code Profile

ZIP Code 77659
Sour Lake, Texas

ZIP code 77659 is in Sour Lake, located in Hardin County, Texas, within the Beaumont-Port Arthur metro area. Its 2020 Census population was 4,964. The estimated median adjusted gross income per tax return is $63,750, and about 8% of filers report $200,000 or more.

2020 Population
4,964
Census ZCTA
County
Hardin
FIPS 48199
Median income (est.)
$63,750
IRS SOI 2022
Land Area
116.511 mi²
+ 1.051 mi² water

01Location & Geography

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

Primary CitySour Lake, TX
CountyHardin County (FIPS 48199)
StateTexas (FIPS 48)
Metro Area (MSA)Beaumont-Port Arthur, TX Metro Area (13140)
Census Region / DivisionSouth Region · West South Central Division
Coordinates30.171444, -94.432274
Land / Water Area116.511 mi² land · 1.051 mi² water

02Income & Economics

Distribution of the 2,410 individual tax returns filed in 77659 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
26.1%
$25K–$50K
17.0%
$50K–$75K
12.4%
$75K–$100K
10.8%
$100K–$200K
25.3%
$200K+
8.3%
The $200,000+ bracket accounts for 36% of 77659's total adjusted gross income, from 8% of returns — a concentration that drives the gap between the median ($63,750) 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 77659's IRS income metrics, 2020–2022.

Median income (2021→2022)
$63,750
▲ 10.9%
Filers earning $200K+
8.3%
▲ 1.3 pt
Total filers
2,410
▲ 4.8%
GET /zipc/v2/zipcodes/77659/soi?year=… $52K 2020 $58K 2021 $64K 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 77659 ZCTA.

2000
4,576
 
2010
4,910
▲ +7.3%
2020
4,964
▲ +1.1%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortC
USPS Finance Number488490
City AliasesGrayburg, Sour Lake

06Frequently Asked Questions

What county is ZIP code 77659 in?

ZIP code 77659 is in Hardin County, Texas (county FIPS code 48199).

What city is ZIP code 77659?

The primary USPS city for 77659 is Sour Lake, TX.

What metro area (MSA) is 77659 in?

77659 is part of the Beaumont-Port Arthur, TX Metro Area (MSA code 13140).

What is the population of ZIP code 77659?

The 2020 Census population of 77659 was 4,964 residents.

What is the median income in ZIP code 77659?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 77659 is about $63,750, with around 8% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.