ZIP Code 08870

08870 is one of New Jersey's ZIP codes, delivering to addresses in Readington, Hunterdon County.

City: Readington
County: Hunterdon County
State: New Jersey
Prefix: 088xx

Where this code sits

08870 is part of the 088xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Readington.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 08870 delivers to without sharing its boundary.

908 Area code 908

ZIP codes nearest 08870

The ZIP codes whose reference points sit closest to 08870.
ZIP code	Distance	Delivers to
ZIP code 08853	2.7 mi	Neshanic Station, NJ
ZIP code 08876	3.0 mi	Somerville, NJ
ZIP code 08888	3.5 mi	Whitehouse, NJ
ZIP code 08889	3.7 mi	Whitehouse Station, NJ
ZIP code 08887	4.5 mi	Three Bridges, NJ
ZIP code 08821	4.5 mi	Flagtown, NJ
ZIP code 08885	4.9 mi	Stanton, NJ
ZIP code 08869	5.3 mi	Raritan, NJ

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 08870, plotted from its record coordinates.

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

Scope ZIP code 08870. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.