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

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — STATE/TX/COUNTY/WASHINGTON

Washington County, TX ZIP codes

Washington County, TX has 6 ZIP codes, in 5 towns: 77833, 77835, 77426, 77880, 78932 and 77834.

The county seat is Brenham.

ZIP codes
6
Towns
5
County seat
Brenham
County FIPS
48477
State
Texas
Population
36,647
Median household income
$77,825
Land area
604 sq mi
Area code
979
Metro area
Brenham

Washington County ZIP codes by town

Brenham (county seat)
77833, 77834

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.

Map of Washington County ZIP codes

774267783377834778357788078932

The ZIP codes of Washington 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.

Washington County in numbers

About 36,647 people live in Washington County, in 15,481 households, the 86th most populous of Texas's 254 counties. The median household income is $77,825 a year, about the same as the Texas median of $78,476 (US: $80,734). The median owner-occupied home is valued at $288,100 (about the same as the Texas median), and median gross rent is $1,165 a month. The median age is 40.9; 30.7% of adults 25 and over hold a bachelor's degree or higher (33.8% across Texas); the average commute takes 23 minutes.

Population36,647Washington36,647
Households15,481Washington15,481
Median age40.9Washington40.9Texas35.6US 38.9
Median household income$77,825Washington$77,825Texas$78,476US $80,734
Median home value$288,100Washington$288,100Texas$283,800US $332,700
Median gross rent$1,165Washington$1,165Texas$1,403US $1,413
Bachelor's degree or higher30.7%Washington30.7%Texas33.8%US 35.7%
Mean commute23.1 minWashington23.1 minTexas26.7 minUS 26.4 min
Population density61 / sq miWashington61 / 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 Washington County

Largest towns in Washington County
TownZIP codesPopulation
Brenham 2 18,641
Washington 1 2,517
Chappell Hill 1 2,007
Burton 1 174
Carmine 1 173

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 Washington County.

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

Every ZIP code in Washington County, with figures

ZIP codes in Washington County
ZIP City Type Population Median income Median home
77426 Chappell Hill , TX Standard 2,007 $80,446 $592,300
77833 Brenham , TX Standard 29,498 $73,388 $280,500
77834 Brenham , TX No street area — — —
77835 Burton , TX Standard 2,569 $109,917 $394,700
77880 Washington , TX Standard 2,517 $90,856 $270,800
78932 Carmine , TX Standard 576 $62,917 $323,600

Cite this page

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

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