ZIP Code 73556

73556 is one of Oklahoma's ZIP codes, delivering to addresses in Martha, Jackson County.

City: Martha
County: Jackson County
State: Oklahoma
Prefix: 735xx

Where this code sits

73556 is part of the 735xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Martha.

Martha Oklahoma ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 73556 delivers to without sharing its boundary.

580 Area code 580

ZIP codes nearest 73556

The ZIP codes whose reference points sit closest to 73556.
ZIP code	Distance	Delivers to
ZIP code 73526	4.8 mi	Blair, OK
ZIP code 73521	6.5 mi	Altus, OK
ZIP code 73522	6.7 mi	Altus, OK
ZIP code 73523	9.3 mi	Altus Afb, OK
ZIP code 73532	10 mi	Duke, OK
ZIP code 73560	12 mi	Olustee, OK
ZIP code 73554	14 mi	Mangum, OK
ZIP code 73539	15 mi	Elmer, OK

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 73556, plotted from its record coordinates.

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

Scope ZIP code 73556. 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.