ZIP Code 77837

77837 is one of Texas's ZIP codes, delivering to addresses in Calvert, Robertson County.

City: Calvert
County: Robertson County
State: Texas
Prefix: 778xx

Where this code sits

77837 is part of the 778xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Calvert.

Calvert Texas ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 77837 delivers to without sharing its boundary.

979 Area code 979

ZIP codes nearest 77837

The ZIP codes whose reference points sit closest to 77837.
ZIP code	Distance	Delivers to
ZIP code 77856	9.2 mi	Franklin, TX
ZIP code 77859	9.3 mi	Hearne, TX
ZIP code 76629	12 mi	Bremond, TX
ZIP code 77857	14 mi	Gause, TX
ZIP code 77870	15 mi	New Baden, TX
ZIP code 76680	16 mi	Reagan, TX
ZIP code 76519	17 mi	Burlington, TX
ZIP code 77882	18 mi	Wheelock, 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 77837, plotted from its record coordinates.

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

Scope ZIP code 77837. 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.