ZIP Code 78340

78340 is one of Texas's ZIP codes, delivering to addresses in Bayside, Refugio County.

City: Bayside
County: Refugio County
State: Texas
Prefix: 783xx

Where this code sits

78340 is part of the 783xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Bayside.

Bayside Texas ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 78340 delivers to without sharing its boundary.

361 Area code 361

ZIP codes nearest 78340

The ZIP codes whose reference points sit closest to 78340.
ZIP code	Distance	Delivers to
ZIP code 78381	9.2 mi	Rockport, TX
ZIP code 78382	9.8 mi	Rockport, TX
ZIP code 78358	11 mi	Fulton, TX
ZIP code 78393	11 mi	Woodsboro, TX
ZIP code 78335	13 mi	Aransas Pass, TX
ZIP code 78359	13 mi	Gregory, TX
ZIP code 78336	13 mi	Aransas Pass, TX
ZIP code 78390	14 mi	Taft, 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 78340, plotted from its record coordinates.

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

Scope ZIP code 78340. 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.