ZIP Code 57521

57521 is one of South Dakota's ZIP codes, delivering to addresses in Belvidere, Jackson County.

City: Belvidere
County: Jackson County
State: South Dakota
Prefix: 575xx

Where this code sits

57521 is part of the 575xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Belvidere.

Belvidere South Dakota ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57521 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57521

The ZIP codes whose reference points sit closest to 57521.
ZIP code	Distance	Delivers to
ZIP code 57552	14 mi	Midland, SD
ZIP code 57543	16 mi	Kadoka, SD
ZIP code 57562	17 mi	Okaton, SD
ZIP code 57567	25 mi	Philip, SD
ZIP code 57559	26 mi	Murdo, SD
ZIP code 57560	29 mi	Norris, SD
ZIP code 57547	30 mi	Long Valley, SD
ZIP code 57577	33 mi	Wanblee, SD

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 57521, plotted from its record coordinates.

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

Scope ZIP code 57521. 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.