ZIP Code 46403

46403 is one of Indiana's ZIP codes, delivering to addresses in Gary, Lake County.

City: Gary
County: Lake County
State: Indiana
Prefix: 464xx

Where this code sits

46403 is part of the 464xx range, the group of codes handled by one mail processing centre. Gary is served by 8 ZIP codes in total; the full list, with the county each falls in, is on the Gary page.

Gary Indiana ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 46403 delivers to without sharing its boundary.

219 Area code 219

ZIP codes nearest 46403

The ZIP codes whose reference points sit closest to 46403.
ZIP code	Distance	Delivers to
ZIP code 46405	2.4 mi	Lake Station, IN
ZIP code 46401	3.3 mi	Gary, IN
ZIP code 46402	4.1 mi	Gary, IN
ZIP code 46407	4.2 mi	Gary, IN
ZIP code 46368	5.0 mi	Portage, IN
ZIP code 46342	5.4 mi	Hobart, IN
ZIP code 46409	5.6 mi	Gary, IN
ZIP code 46404	6.0 mi	Gary, IN

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 46403, plotted from its record coordinates.

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

Scope ZIP code 46403. 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.