ZIP Code 58521

58521 is one of North Dakota's ZIP codes, delivering to addresses in Baldwin, Burleigh County.

City: Baldwin
County: Burleigh County
State: North Dakota
Prefix: 585xx

Where this code sits

58521 is part of the 585xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Baldwin.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 58521 delivers to without sharing its boundary.

701 Area code 701

ZIP codes nearest 58521

The ZIP codes whose reference points sit closest to 58521.
ZIP code	Distance	Delivers to
ZIP code 58502	5.9 mi	Bismarck, ND
ZIP code 58503	8.0 mi	Bismarck, ND
ZIP code 58505	9.6 mi	Bismarck, ND
ZIP code 58501	10 mi	Bismarck, ND
ZIP code 58506	10 mi	Bismarck, ND
ZIP code 58507	10 mi	Bismarck, ND
ZIP code 58554	11 mi	Mandan, ND
ZIP code 58558	14 mi	Menoken, ND

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 58521, plotted from its record coordinates.

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

Scope ZIP code 58521. 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.