Hydro Oklahoma ZIP Codes

Hydro holds a single ZIP code.

Every ZIP code in Hydro

The complete list of Hydro, Oklahoma ZIP codes with the county each falls in.
ZIP code	County
73048	Caddo County

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Hydro codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Hydro. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.

How these codes cluster

Every Hydro ZIP code begins 730. Those first three digits identify the sectional center facility that processes mail for this part of Oklahoma. Statewide that range covers 89 ZIP codes, so Hydro accounts for 1% of it.

Every Oklahoma ZIP prefix and the region it covers →

Area codes covering Hydro

ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The codes below serve the same ground Hydro occupies.

Hydro Oklahoma area codes in full →

Where Hydro's ZIP codes sit

Each point is one Hydro ZIP code, plotted from its record coordinates.

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

Cities near Hydro

The closest places to Hydro with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Weatherford Oklahoma ZIP codes	5.9 mi	1 ZIP code
Hinton Oklahoma ZIP codes	13 mi	1 ZIP code
Colony Oklahoma ZIP codes	15 mi	1 ZIP code
Geary Oklahoma ZIP codes	16 mi	1 ZIP code
Thomas Oklahoma ZIP codes	16 mi	1 ZIP code
Corn Oklahoma ZIP codes	16 mi	1 ZIP code
Eakly Oklahoma ZIP codes	17 mi	1 ZIP code
Greenfield Oklahoma ZIP codes	17 mi	1 ZIP code

Straight-line distance between place reference points, not driving distance.