ZIP Code 50450

50450 is one of Iowa's ZIP codes, delivering to addresses in Lake Mills, Winnebago County.

City: Lake Mills
County: Winnebago County
State: Iowa
Prefix: 504xx

Where this code sits

50450 is part of the 504xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Lake Mills.

Lake Mills Iowa ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 50450 delivers to without sharing its boundary.

641 Area code 641

ZIP codes nearest 50450

The ZIP codes whose reference points sit closest to 50450.
ZIP code	Distance	Delivers to
ZIP code 50446	5.2 mi	Joice, IA
ZIP code 50473	6.5 mi	Scarville, IA
ZIP code 56029	6.9 mi	Emmons, MN
ZIP code 50453	9.4 mi	Leland, IA
ZIP code 50478	11 mi	Thompson, IA
ZIP code 56089	11 mi	Twin Lakes, MN
ZIP code 50436	11 mi	Forest City, IA
ZIP code 50434	12 mi	Fertile, 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 50450, plotted from its record coordinates.

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

Scope ZIP code 50450. 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.