Rocky Hill New Jersey ZIP Codes
Rocky Hill holds a single ZIP code.
Every ZIP code in Rocky Hill
| ZIP code | County |
|---|---|
| 08553 | Somerset 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Rocky Hill codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Rocky Hill. 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 Rocky Hill ZIP code begins 085. Those first three digits identify the sectional center facility that processes mail for this part of New Jersey. Statewide that range covers 37 ZIP codes, so Rocky Hill accounts for 3% of it.
Every New Jersey ZIP prefix and the region it covers →
Area codes covering Rocky Hill
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 Rocky Hill occupies.
Rocky Hill New Jersey area codes in full →
Where Rocky Hill's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Rocky Hill
| City | Distance | ZIP codes |
|---|---|---|
| Princeton New Jersey ZIP codes | 3.3 mi | 5 ZIP codes |
| Hopewell New Jersey ZIP codes | 6.6 mi | 1 ZIP code |
| Dayton New Jersey ZIP codes | 7.1 mi | 1 ZIP code |
| Millstone Township New Jersey ZIP codes | 7.2 mi | 2 ZIP codes |
| Hillsborough New Jersey ZIP codes | 7.5 mi | 1 ZIP code |
| Pennington New Jersey ZIP codes | 9.5 mi | 1 ZIP code |
| Manville New Jersey ZIP codes | 10 mi | 1 ZIP code |
| Somerset New Jersey ZIP codes | 10 mi | 2 ZIP codes |
Straight-line distance between place reference points, not driving distance.