ZIP Code 57365

57365 is one of South Dakota's ZIP codes, delivering to addresses in Oacoma, Lyman County.

City: Oacoma
County: Lyman County
State: South Dakota
Prefix: 573xx

Where this code sits

57365 is part of the 573xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Oacoma.

Oacoma South Dakota ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 57365 delivers to without sharing its boundary.

605 Area code 605

ZIP codes nearest 57365

The ZIP codes whose reference points sit closest to 57365.
ZIP code	Distance	Delivers to
ZIP code 57326	3.3 mi	Chamberlain, SD
ZIP code 57325	4.1 mi	Chamberlain, SD
ZIP code 57370	11 mi	Pukwana, SD
ZIP code 57569	12 mi	Reliance, SD
ZIP code 57339	18 mi	Fort Thompson, SD
ZIP code 57534	18 mi	Hamill, SD
ZIP code 57355	22 mi	Kimball, SD
ZIP code 57548	23 mi	Lower Brule, 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 57365, plotted from its record coordinates.

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

Scope ZIP code 57365. 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.