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US ZIP Code Profile

ZIP Code 77640
Port Arthur, Texas

ZIP code 77640 is in Port Arthur, located in Jefferson County, Texas, within the Beaumont-Port Arthur metro area. Its 2020 Census population was 16,618. The estimated median adjusted gross income per tax return is $31,985, and about 1% of filers report $200,000 or more.

2020 Population
16,618
Census ZCTA
County
Jefferson
FIPS 48245
Median income (est.)
$31,985
IRS SOI 2022
Land Area
38.773 mi²
+ 33.669 mi² water

01Location & Geography

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

Primary CityPort Arthur, TX
CountyJefferson County (FIPS 48245)
StateTexas (FIPS 48)
Metro Area (MSA)Beaumont-Port Arthur, TX Metro Area (13140)
Census Region / DivisionSouth Region · West South Central Division
Coordinates29.881613, -93.94086
Land / Water Area38.773 mi² land · 33.669 mi² water

02Income & Economics

Distribution of the 6,710 individual tax returns filed in 77640 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
42.9%
$25K–$50K
25.3%
$50K–$75K
13.6%
$75K–$100K
7.4%
$100K–$200K
9.4%
$200K+
1.3%
The $200,000+ bracket accounts for 9% of 77640's total adjusted gross income, from 1% of returns — a concentration that drives the gap between the median ($31,985) 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 77640's IRS income metrics, 2020–2022.

Median income (2021→2022)
$31,985
▲ 3.5%
Filers earning $200K+
1.3%
▲ 0.2 pt
Total filers
6,710
▼ 2.2%
GET /zipc/v2/zipcodes/77640/soi?year=… $29K 2020 $31K 2021 $32K 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 77640 ZCTA.

2000
20,008
 
2010
16,875
▼ -15.7%
2020
16,618
▼ -1.5%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortC
USPS Finance Number487195
City AliasesGriffing, Griffing Park, Pear Ridge, Port Arthur, Pt Acres, Sabine, West Port Arthur, Port Acres

06Frequently Asked Questions

What county is ZIP code 77640 in?

ZIP code 77640 is in Jefferson County, Texas (county FIPS code 48245).

What city is ZIP code 77640?

The primary USPS city for 77640 is Port Arthur, TX.

What metro area (MSA) is 77640 in?

77640 is part of the Beaumont-Port Arthur, TX Metro Area (MSA code 13140).

What is the population of ZIP code 77640?

The 2020 Census population of 77640 was 16,618 residents.

What is the median income in ZIP code 77640?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 77640 is about $31,985, with around 1% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.