Adelphi Ohio ZIP Codes

Adelphi holds a single ZIP code.

Every ZIP code in Adelphi

The complete list of Adelphi, Ohio ZIP codes with the county each falls in.
ZIP code	County
43101	Ross 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Adelphi codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Adelphi. 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 Adelphi ZIP code begins 431. Those first three digits identify the sectional center facility that processes mail for this part of Ohio. Statewide that range covers 49 ZIP codes, so Adelphi accounts for 2% of it.

Every Ohio ZIP prefix and the region it covers →

Area codes covering Adelphi

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 Adelphi occupies.

Adelphi Ohio area codes in full →

Where Adelphi's ZIP codes sit

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

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

Cities near Adelphi

The closest places to Adelphi with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Laurelville Ohio ZIP codes	0.8 mi	1 ZIP code
Tarlton Ohio ZIP codes	6.4 mi	1 ZIP code
Kingston Ohio ZIP codes	8.9 mi	1 ZIP code
Stoutsville Ohio ZIP codes	11 mi	1 ZIP code
Amanda Ohio ZIP codes	13 mi	1 ZIP code
Circleville Ohio ZIP codes	14 mi	1 ZIP code
Sugar Grove Ohio ZIP codes	16 mi	1 ZIP code
Chillicothe Ohio ZIP codes	16 mi	1 ZIP code

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