Ada Ohio ZIP Codes

Ada holds a single ZIP code.

Every ZIP code in Ada

The complete list of Ada, Ohio ZIP codes with the county each falls in.
ZIP code	County
45810	Hardin 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Ada codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Ada. 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 Ada ZIP code begins 458. Those first three digits identify the sectional center facility that processes mail for this part of Ohio. Statewide that range covers 85 ZIP codes, so Ada accounts for 1% of it.

Every Ohio ZIP prefix and the region it covers →

Area codes covering Ada

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 Ada occupies.

Ada Ohio area codes in full →

Where Ada's ZIP codes sit

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

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

Cities near Ada

The closest places to Ada with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Alger Ohio ZIP codes	4.1 mi	1 ZIP code
Harrod Ohio ZIP codes	6.6 mi	1 ZIP code
Beaverdam Ohio ZIP codes	8.9 mi	1 ZIP code
Bluffton Ohio ZIP codes	9.2 mi	1 ZIP code
Dunkirk Ohio ZIP codes	9.7 mi	1 ZIP code
Jenera Ohio ZIP codes	10 mi	1 ZIP code
Mount Cory Ohio ZIP codes	12 mi	1 ZIP code
Arlington Ohio ZIP codes	13 mi	1 ZIP code

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