ZIP Code 63045

63045 is one of Missouri's ZIP codes, delivering to addresses in Earth City, St. Louis County.

City: Earth City
County: St. Louis County
State: Missouri
Prefix: 630xx

Where this code sits

63045 is part of the 630xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Earth City.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 63045 delivers to without sharing its boundary.

ZIP codes nearest 63045

The ZIP codes whose reference points sit closest to 63045.
ZIP code	Distance	Delivers to
ZIP code 63302	1.3 mi	Saint Charles, MO
ZIP code 63044	3.0 mi	Bridgeton, MO
ZIP code 63301	3.1 mi	Saint Charles, MO
ZIP code 63043	3.3 mi	Maryland Heights, MO
ZIP code 63346	4.0 mi	Flinthill, MO
ZIP code 63303	4.4 mi	Saint Charles, MO
ZIP code 63146	4.5 mi	Saint Louis, MO
ZIP code 63074	5.2 mi	Saint Ann, 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 63045, plotted from its record coordinates.

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

Scope ZIP code 63045. 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.