Ontario Ohio ZIP Codes

Ontario holds a single ZIP code.

Every ZIP code in Ontario

The complete list of Ontario, Ohio ZIP codes with the county each falls in.
ZIP code	County
44862	Richland 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Ontario codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Ontario. 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 Ontario ZIP code begins 448. Those first three digits identify the sectional center facility that processes mail for this part of Ohio. Statewide that range covers 63 ZIP codes, so Ontario accounts for 2% of it.

Every Ohio ZIP prefix and the region it covers →

Area codes covering Ontario

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 Ontario occupies.

Ontario Ohio area codes in full →

Where Ontario's ZIP codes sit

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

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

Cities near Ontario

The closest places to Ontario with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Mansfield Ohio ZIP codes	4.4 mi	7 ZIP codes
Crestline Ohio ZIP codes	7.0 mi	1 ZIP code
Shelby Ohio ZIP codes	8.4 mi	1 ZIP code
Galion Ohio ZIP codes	9.0 mi	1 ZIP code
Lucas Ohio ZIP codes	11 mi	1 ZIP code
Bellville Ohio ZIP codes	12 mi	1 ZIP code
Tiro Ohio ZIP codes	13 mi	1 ZIP code
North Robinson Ohio ZIP codes	13 mi	1 ZIP code

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