ZIP Code 78017

78017 is one of Texas's ZIP codes, delivering to addresses in Dilley, Frio County.

City: Dilley
County: Frio County
State: Texas
Prefix: 780xx

Where this code sits

78017 is part of the 780xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Dilley.

Dilley Texas ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 78017 delivers to without sharing its boundary.

830 Area code 830

ZIP codes nearest 78017

The ZIP codes whose reference points sit closest to 78017.
ZIP code	Distance	Delivers to
ZIP code 78061	16 mi	Pearsall, TX
ZIP code 78014	17 mi	Cotulla, TX
ZIP code 78021	24 mi	Fowlerton, TX
ZIP code 78830	26 mi	Big Wells, TX
ZIP code 78057	28 mi	Moore, TX
ZIP code 78001	29 mi	Artesia Wells, TX
ZIP code 78011	31 mi	Charlotte, TX
ZIP code 78829	32 mi	Batesville, 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 78017, plotted from its record coordinates.

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

Scope ZIP code 78017. 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.