Seneca County ZIP Codes

Seneca County is a county of Ohio.

ZIP codes: 14
Cities & towns: 14
Area codes: 2
Land area: 551 sq mi

Every ZIP code in Seneca County

448xx

The complete list of Seneca County, OH ZIP codes with the city each one delivers to.
ZIP code	City
44802	Alvada
44807	Attica
44809	Bascom
44815	Bettsville
44818	Bloomville
44828	Flat Rock
44830	Fostoria
44836	Green Springs
44841	Kansas
44845	Melmore
44853	New Riegel
44861	Old Fort
44867	Republic
44883	Tiffin

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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

Cities and towns in Seneca County

A further 6 places in Seneca 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 Seneca County

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

Where Seneca County's ZIP codes sit

Each point is the reference point of one Seneca 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 Seneca 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.