ZIP Code 46373

46373 is one of Indiana's ZIP codes, delivering to addresses in Saint John, Lake County.

City: Saint John
County: Lake County
State: Indiana
Prefix: 463xx

Where this code sits

46373 is part of the 463xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Saint John.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 46373 delivers to without sharing its boundary.

219 Area code 219

ZIP codes nearest 46373

The ZIP codes whose reference points sit closest to 46373.
ZIP code	Distance	Delivers to
ZIP code 46375	3.1 mi	Schererville, IN
ZIP code 46311	3.4 mi	Dyer, IN
ZIP code 46303	5.4 mi	Cedar Lake, IN
ZIP code 46325	5.4 mi	Hammond, IN
ZIP code 46411	5.4 mi	Merrillville, IN
ZIP code 46308	6.2 mi	Crown Point, IN
ZIP code 46319	6.4 mi	Griffith, IN
ZIP code 46307	6.5 mi	Crown Point, 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 46373, plotted from its record coordinates.

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

Scope ZIP code 46373. 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.