ZIP Code 57787

57787 is one of South Dakota's ZIP codes, delivering to addresses in Union Center, Meade County.

City: Union Center
County: Meade County
State: South Dakota
Prefix: 577xx

Where this code sits

57787 is part of the 577xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Union Center.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57787 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57787

The ZIP codes whose reference points sit closest to 57787.
ZIP code	Distance	Delivers to
ZIP code 57737	9.6 mi	Enning, SD
ZIP code 57792	14 mi	White Owl, SD
ZIP code 57758	26 mi	Mud Butte, SD
ZIP code 57788	32 mi	Vale, SD
ZIP code 57791	33 mi	Wasta, SD
ZIP code 57760	33 mi	Newell, SD
ZIP code 57748	35 mi	Howes, SD
ZIP code 57785	37 mi	Sturgis, 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 57787, plotted from its record coordinates.

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

Scope ZIP code 57787. 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.