ZIP Code 78623

78623 is one of Texas's ZIP codes, delivering to addresses in Fischer, Comal County.

City: Fischer
County: Comal County
State: Texas
Prefix: 786xx

Where this code sits

78623 is part of the 786xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Fischer.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 78623 delivers to without sharing its boundary.

830 Area code 830

ZIP codes nearest 78623

The ZIP codes whose reference points sit closest to 78623.
ZIP code	Distance	Delivers to
ZIP code 78133	3.9 mi	Canyon Lake, TX
ZIP code 78676	7.3 mi	Wimberley, TX
ZIP code 78070	11 mi	Spring Branch, TX
ZIP code 78667	14 mi	San Marcos, TX
ZIP code 78132	14 mi	New Braunfels, TX
ZIP code 78619	15 mi	Driftwood, TX
ZIP code 78606	15 mi	Blanco, TX
ZIP code 78666	17 mi	San Marcos, 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 78623, plotted from its record coordinates.

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

Scope ZIP code 78623. 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.