ZIP Code 73855

73855 is one of Oklahoma's ZIP codes, delivering to addresses in Rosston, Harper County.

City: Rosston
County: Harper County
State: Oklahoma
Prefix: 738xx

Where this code sits

73855 is part of the 738xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Rosston.

Rosston Oklahoma ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 73855 delivers to without sharing its boundary.

580 Area code 580

ZIP codes nearest 73855

The ZIP codes whose reference points sit closest to 73855.
ZIP code	Distance	Delivers to
ZIP code 73844	9.6 mi	Gate, OK
ZIP code 67840	12 mi	Englewood, KS
ZIP code 73848	12 mi	Laverne, OK
ZIP code 73851	19 mi	May, OK
ZIP code 73834	19 mi	Buffalo, OK
ZIP code 67831	22 mi	Ashland, KS
ZIP code 73841	28 mi	Fort Supply, OK
ZIP code 67127	32 mi	Protection, KS

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 73855, plotted from its record coordinates.

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

Scope ZIP code 73855. 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.