ZIP Code 50240

50240 is one of Iowa's ZIP codes, delivering to addresses in Saint Charles, Madison County.

City: Saint Charles
County: Madison County
State: Iowa
Prefix: 502xx

Where this code sits

50240 is part of the 502xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Saint Charles.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 50240 delivers to without sharing its boundary.

641 Area code 641

ZIP codes nearest 50240

The ZIP codes whose reference points sit closest to 50240.
ZIP code	Distance	Delivers to
ZIP code 50241	4.7 mi	Saint Marys, IA
ZIP code 50218	4.9 mi	Patterson, IA
ZIP code 50033	5.1 mi	Bevington, IA
ZIP code 50257	5.9 mi	Truro, IA
ZIP code 50160	7.2 mi	Martensdale, IA
ZIP code 50229	7.8 mi	Prole, IA
ZIP code 50222	8.2 mi	Peru, IA
ZIP code 50210	9.7 mi	New Virginia, IA

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 50240, plotted from its record coordinates.

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

Scope ZIP code 50240. 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.