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US ZIP Code Profile

ZIP Code 77880
Washington, Texas

ZIP code 77880 is in Washington, located in Washington County, Texas, within the Brenham metro area. Its 2020 Census population was 1,922. The estimated median adjusted gross income per tax return is $42,500, and about 8% of filers report $200,000 or more.

2020 Population
1,922
Census ZCTA
County
Washington
FIPS 48477
Median income (est.)
$42,500
IRS SOI 2022
Land Area
95.345 mi²
+ 1.884 mi² water

01Location & Geography

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

Primary CityWashington, TX
CountyWashington County (FIPS 48477)
StateTexas (FIPS 48)
Metro Area (MSA)Brenham, TX Micro Area (14780)
Census Region / DivisionSouth Region · West South Central Division
Coordinates30.286936, -96.18936
Land / Water Area95.345 mi² land · 1.884 mi² water

02Income & Economics

Distribution of the 880 individual tax returns filed in 77880 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
34.1%
$25K–$50K
22.7%
$50K–$75K
11.4%
$75K–$100K
10.2%
$100K–$200K
13.6%
$200K+
8.0%
The $200,000+ bracket accounts for 53% of 77880's total adjusted gross income, from 8% of returns — a concentration that drives the gap between the median ($42,500) 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 77880's IRS income metrics, 2020–2022.

Median income (2021→2022)
$42,500
▲ 13.3%
Filers earning $200K+
8.0%
▲ 1.1 pt
Total filers
880
▲ 0.0%
GET /zipc/v2/zipcodes/77880/soi?year=… $39K 2020 $38K 2021 $42K 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 77880 ZCTA.

2000
1,413
 
2010
1,879
▲ +33.0%
2020
1,922
▲ +2.3%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortC
USPS Finance Number489480
City AliasesWashington

06Frequently Asked Questions

What county is ZIP code 77880 in?

ZIP code 77880 is in Washington County, Texas (county FIPS code 48477).

What city is ZIP code 77880?

The primary USPS city for 77880 is Washington, TX.

What metro area (MSA) is 77880 in?

77880 is part of the Brenham, TX Micro Area (MSA code 14780).

What is the population of ZIP code 77880?

The 2020 Census population of 77880 was 1,922 residents.

What is the median income in ZIP code 77880?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 77880 is about $42,500, 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.