What county is Baytown, TX in?
Updated · Data: U.S. Census Bureau
Baytown, Texas is in 2 counties. Most residents (94.3%) live in the Harris County part; the rest live in Chambers County.
Which counties do Baytown residents live in?
| County | Share of residents | Chart |
|---|---|---|
| Harris County | 94.3% (79,701 people) | |
| Chambers County | 5.7% (4,837 people) |
How is Baytown's land split between counties?
| County | Share of land area | Chart |
|---|---|---|
| Harris County | 90.3% | |
| Chambers County | 9.7% |
Inside Baytown, the county depends on the address: check your address privately. See all Texas cities in more than one county or look up another city.
Baytown at a glance
What ZIP codes are in Baytown?
4 ZIP codes use the name Baytown or are centered in it. Shares are of each ZIP's land; a ZIP named after a town can reach beyond its city limits.
| ZIP | Post office name | County (land share) |
|---|---|---|
| 77520 | Baytown | Harris County 96%, Chambers County 4% |
| 77521 | Baytown | Harris County 77%, Chambers County 23% |
| 77522 | Baytown | Harris County |
| 77523 | Baytown | Chambers County 95%, Harris County 5% |
About Harris County
County seat: Houston. FIPS code 48201. Population 4,758,579. All Harris County facts.
Towns near Baytown
- Highlands: 6.4 mi away, Harris County
- Beach City: 7.5 mi away, Chambers County
- Mont Belvieu: 8.1 mi away, Chambers County
- La Porte: 8.3 mi away, Harris County
- Barrett: 8.6 mi away, Harris County
- Channelview: 9.0 mi away, Harris County
Baytown has about 84,538 people. It is an incorporated city or town.
Sources: ACS 2019-2023 5-year (residents by county, table B01003); Census TIGER/Line 2024 and Gazetteer 2024 (land, location); Census 2020 ZCTA file and GeoNames (ZIP codes). Data as of November 1, 2026. Not affiliated with any government agency.
FAQ
Frequently asked questions
What county is Baytown, TX in?
Is Baytown in more than one county?
What ZIP codes are in Baytown, TX?
Is Baytown the county seat of Harris County?
What time zone is Baytown, TX in?
How do I know which county my Baytown address is in?
Free · No signup · Private
Find your county now
Use your location, a city or a ZIP code. The check runs on your device; your location is never sent or stored.