ZIP Code 63012

63012 is one of Missouri's ZIP codes, delivering to addresses in Barnhart, Jefferson County.

City: Barnhart
County: Jefferson County
State: Missouri
Prefix: 630xx

Where this code sits

63012 is part of the 630xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Barnhart.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 63012 delivers to without sharing its boundary.

ZIP codes nearest 63012

The ZIP codes whose reference points sit closest to 63012.
ZIP code	Distance	Delivers to
ZIP code 63057	0.4 mi	Liguori, MO
ZIP code 63053	3.3 mi	Kimmswick, MO
ZIP code 63070	4.0 mi	Pevely, MO
ZIP code 63052	4.9 mi	Imperial, MO
ZIP code 63048	5.4 mi	Herculaneum, MO
ZIP code 63010	6.5 mi	Arnold, MO
ZIP code 62295	6.8 mi	Valmeyer, IL
ZIP code 63065	7.2 mi	Mapaville, MO

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 63012, plotted from its record coordinates.

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

Scope ZIP code 63012. 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.