ZIP Code 08831

08831 is one of New Jersey's ZIP codes, delivering to addresses in Monroe Township, Middlesex County.

City: Monroe Township
County: Middlesex County
State: New Jersey
Prefix: 088xx

Where this code sits

08831 is part of the 088xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Monroe Township.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 08831 delivers to without sharing its boundary.

ZIP codes nearest 08831

The ZIP codes whose reference points sit closest to 08831.
ZIP code	Distance	Delivers to
ZIP code 08828	4.1 mi	Helmetta, NJ
ZIP code 08512	4.2 mi	Cranbury, NJ
ZIP code 08884	5.0 mi	Spotswood, NJ
ZIP code 07726	5.2 mi	Englishtown, NJ
ZIP code 07763	5.7 mi	Tennent, NJ
ZIP code 08810	6.2 mi	Dayton, NJ
ZIP code 08520	6.2 mi	Hightstown, NJ
ZIP code 08555	7.2 mi	Roosevelt, 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 08831, plotted from its record coordinates.

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

Scope ZIP code 08831. 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.