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Northumberland Pennsylvania ZIP Codes

Northumberland holds a single ZIP code.

Every ZIP code in Northumberland

The complete list of Northumberland, Pennsylvania ZIP codes with the county each falls in.
ZIP codeCounty
17857Northumberland 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Northumberland codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Northumberland. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.

How these codes cluster

Every Northumberland ZIP code begins 178. Those first three digits identify the sectional center facility that processes mail for this part of Pennsylvania. Statewide that range covers 60 ZIP codes, so Northumberland accounts for 2% of it.

Every Pennsylvania ZIP prefix and the region it covers →

Area codes covering Northumberland

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 Northumberland occupies.

Northumberland Pennsylvania area codes in full →

Where Northumberland's ZIP codes sit

Each point is one Northumberland ZIP code, plotted from its record coordinates.
  • Reference points and footprint
  • Not an official NANPA boundary
  • Not a USPS delivery area

Cities near Northumberland

The closest places to Northumberland with their own ZIP code list, nearest first.
CityDistanceZIP codes
Sunbury Pennsylvania ZIP codes2.5 mi1 ZIP code
Shamokin Dam Pennsylvania ZIP codes3.2 mi1 ZIP code
Snydertown Pennsylvania ZIP codes6.5 mi1 ZIP code
Lewisburg Pennsylvania ZIP codes6.9 mi1 ZIP code
Selinsgrove Pennsylvania ZIP codes7.7 mi1 ZIP code
Milton Pennsylvania ZIP codes7.9 mi1 ZIP code
Riverside Pennsylvania ZIP codes8.7 mi1 ZIP code
New Berlin Pennsylvania ZIP codes9.9 mi1 ZIP code

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