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Middlesex New Jersey ZIP Codes

Middlesex holds a single ZIP code.

Every ZIP code in Middlesex

The complete list of Middlesex, New Jersey ZIP codes with the county each falls in.
ZIP codeCounty
08846Middlesex 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Middlesex codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Middlesex. 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 Middlesex ZIP code begins 088. Those first three digits identify the sectional center facility that processes mail for this part of New Jersey. Statewide that range covers 67 ZIP codes, so Middlesex accounts for 1% of it.

Every New Jersey ZIP prefix and the region it covers →

Area codes covering Middlesex

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 Middlesex occupies.

Middlesex New Jersey area codes in full →

Where Middlesex's ZIP codes sit

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

Cities near Middlesex

The closest places to Middlesex with their own ZIP code list, nearest first.
CityDistanceZIP codes
Dunellen New Jersey ZIP codes2.0 mi1 ZIP code
South Bound Brook New Jersey ZIP codes2.1 mi1 ZIP code
Bound Brook New Jersey ZIP codes2.1 mi1 ZIP code
Warren New Jersey ZIP codes4.0 mi1 ZIP code
South Plainfield New Jersey ZIP codes4.4 mi1 ZIP code
Somerset New Jersey ZIP codes4.6 mi2 ZIP codes
Plainfield New Jersey ZIP codes5.2 mi4 ZIP codes
Manville New Jersey ZIP codes5.3 mi1 ZIP code

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