ZIP Code 57638

57638 is one of South Dakota's ZIP codes, delivering to addresses in Lemmon, Perkins County.

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

Where this code sits

57638 is part of the 576xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Lemmon.

Lemmon South Dakota ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57638 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57638

The ZIP codes whose reference points sit closest to 57638.
ZIP code	Distance	Delivers to
ZIP code 57634	19 mi	Keldron, SD
ZIP code 57645	23 mi	Morristown, SD
ZIP code 57640	28 mi	Lodgepole, SD
ZIP code 58639	30 mi	Hettinger, ND
ZIP code 57620	31 mi	Bison, SD
ZIP code 58646	32 mi	Mott, ND
ZIP code 57660	33 mi	Watauga, SD
ZIP code 58562	34 mi	New Leipzig, 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 57638, plotted from its record coordinates.

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

Scope ZIP code 57638. 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.