ZIP Code 63031

63031 is one of Missouri's ZIP codes, delivering to addresses in Florissant, St. Louis County.

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

Where this code sits

63031 is part of the 630xx range, the group of codes handled by one mail processing centre. Florissant is served by 4 ZIP codes in total; the full list, with the county each falls in, is on the Florissant page.

Florissant Missouri ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 63031 delivers to without sharing its boundary.

ZIP codes nearest 63031

The ZIP codes whose reference points sit closest to 63031.
ZIP code	Distance	Delivers to
ZIP code 63042	2.3 mi	Hazelwood, MO
ZIP code 63034	3.1 mi	Florissant, MO
ZIP code 63033	3.2 mi	Florissant, MO
ZIP code 63134	4.4 mi	Saint Louis, MO
ZIP code 63135	4.5 mi	Saint Louis, MO
ZIP code 63140	4.9 mi	Saint Louis, MO
ZIP code 63044	5.6 mi	Bridgeton, MO
ZIP code 63074	6.1 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 63031, plotted from its record coordinates.

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

Scope ZIP code 63031. 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.