ZIP code · Rocky Hill · New Jersey · United States
ZIP code 08553 — Rocky Hill
ZIP code 08553 serves Rocky Hill, New Jersey.
- Postal code
- 08553Single source Value from one source, not cross-checked.
- City
- Rocky Hill
- County
- Somerset FIPS 34035
- State
- New Jersey
- Country
- United States
- Coordinates
- 40.4010, -74.6400 — precision precise (locality)
View on OpenStreetMap - Population
- 814 (ZCTA, ACS 5-year)
- Population density
- 1,334 / sq mi
- Land area
- 0.6 sq mi (1.6 km²) (ZCTA, ACS 5-year)
- Median household income
- $127,344
- Per-capita income
- $77,165
- Median age
- 42.8
- Households
- 319
- Housing units
- 319
- Median home value
- $608,200
- Median gross rent
- $1,660 / month
- Congressional district
- NJ-12 (119th Congress)
- USDA hardiness zone
- 7a (0 to 5 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
Tools: compare 08553 with another ZIP · ZIPs within 25 miles · distance from 08553
Map of ZIP code 08553
Climate — monthly normals
Warmest month Jul (avg high 85°F), coldest Jan (avg low 22°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 38 | 41 | 50 | 62 | 71 | 80 | 85 | 83 | 77 | 65 | 54 | 43 |
| Avg low °F | 22 | 23 | 30 | 40 | 50 | 59 | 64 | 62 | 55 | 44 | 35 | 28 |
| Precip in | 3.8 | 3.0 | 4.3 | 4.0 | 4.3 | 4.7 | 5.5 | 4.3 | 4.5 | 4.4 | 3.5 | 4.6 |
NOAA 1991–2020 climate normals from the nearest station: WERTSVILLE 4 NE (8.1 mi) · NOAA NCEI
Places in ZIP 08553
- 1 restaurants & cafés
- 1 bars & pubs
- 4 parks
- 2 playgrounds
- 1 libraries
- 3 places of worship
- 1 banks
- 1 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page