ZIP Code 78646

78646 is one of Texas's ZIP codes, delivering to addresses in Leander, Williamson County.

City: Leander
County: Williamson County
State: Texas
Prefix: 786xx

Where this code sits

78646 is part of the 786xx range, the group of codes handled by one mail processing centre. Leander is served by 3 ZIP codes in total; the full list, with the county each falls in, is on the Leander page.

Leander Texas ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 78646 delivers to without sharing its boundary.

ZIP codes nearest 78646

The ZIP codes whose reference points sit closest to 78646.
ZIP code	Distance	Delivers to
ZIP code 78641	0.4 mi	Leander, TX
ZIP code 78613	5.4 mi	Cedar Park, TX
ZIP code 78630	5.4 mi	Cedar Park, TX
ZIP code 78628	7.4 mi	Georgetown, TX
ZIP code 78642	7.5 mi	Liberty Hill, TX
ZIP code 78717	8.1 mi	Austin, TX
ZIP code 78729	10 mi	Austin, TX
ZIP code 78726	10 mi	Austin, 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 78646, plotted from its record coordinates.

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

Scope ZIP code 78646. 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.