ZIP Code 77521

77521 is one of Texas's ZIP codes, delivering to addresses in Baytown, Harris County.

City: Baytown
County: Harris County
State: Texas
Prefix: 775xx

Where this code sits

77521 is part of the 775xx range, the group of codes handled by one mail processing centre. Baytown is served by 4 ZIP codes in total; the full list, with the county each falls in, is on the Baytown page.

Baytown Texas ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 77521 delivers to without sharing its boundary.

ZIP codes nearest 77521

The ZIP codes whose reference points sit closest to 77521.
ZIP code	Distance	Delivers to
ZIP code 77520	1.7 mi	Baytown, TX
ZIP code 77522	2.5 mi	Baytown, TX
ZIP code 77562	5.8 mi	Highlands, TX
ZIP code 77523	6.5 mi	Baytown, TX
ZIP code 77580	7.1 mi	Mont Belvieu, TX
ZIP code 77571	7.5 mi	La Porte, TX
ZIP code 77572	7.8 mi	La Porte, TX
ZIP code 77530	9.8 mi	Channelview, TX

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 77521, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 77521. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.