Delaware County ZIP Codes

Delaware County is a county of Oklahoma.

ZIP codes: 8
Cities & towns: 7
Area codes: 2
Land area: 738 sq mi

Every ZIP code in Delaware County

743xx

The complete list of Delaware County, OK ZIP codes with the city each one delivers to.
ZIP code	City
74338	Colcord
74342	Eucha
74344	Grove
74345	Grove
74346	Jay
74347	Kansas
74359	Oaks
74368	Twin Oaks

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Delaware County codes above are listed without a column we would have to invent.

Cities and towns in Delaware County

A further 2 places in Delaware County appear in the postal source without a page of its own; their codes are in the table above and each one links to its own page.

Area codes covering Delaware County

Telephone and postal boundaries are drawn by different bodies, so these codes overlap the county without matching its edges.

Where Delaware County's ZIP codes sit

Each point is the reference point of one Delaware County ZIP code, plotted from its record coordinates. The outline is the convex envelope of those points — a footprint, not a boundary.

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

Scope every ZIP code recorded in Delaware County. Source GeoNames US postal codes (2026-07 postal dump), Census 2024 county Gazetteer (2024 Gazetteer) and geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot). Updated 16 July 2026. The outline is a convex envelope of ZIP reference points, not a jurisdiction boundary.