ZIP Code 57640

57640 is one of South Dakota's ZIP codes, delivering to addresses in Lodgepole, Perkins County.

City: Lodgepole
County: Perkins County
State: South Dakota
Prefix: 576xx

Where this code sits

57640 is part of the 576xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Lodgepole.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57640 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57640

The ZIP codes whose reference points sit closest to 57640.
ZIP code	Distance	Delivers to
ZIP code 57650	14 mi	Ralph, SD
ZIP code 58639	16 mi	Hettinger, ND
ZIP code 57649	17 mi	Prairie City, SD
ZIP code 58649	22 mi	Reeder, ND
ZIP code 57620	25 mi	Bison, SD
ZIP code 57651	25 mi	Reva, SD
ZIP code 58653	26 mi	Scranton, ND
ZIP code 57638	28 mi	Lemmon, 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 57640, plotted from its record coordinates.

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

Scope ZIP code 57640. 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.