Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/NJ/EAST-ROCKY-HILL

East Rocky Hill ZIP codes, New Jersey

No ZIP code is named for East Rocky Hill, NJ; addresses there use a neighbouring town's name. The ZIP code covering it is 08540. Its area codes are 609 and 640.

USPS city name
0 ZIP codes
Overlapping the city
1 more
Population
235
Area codes
609, 640

NANPA lists no telephone rate centre for East Rocky Hill itself, so these are the area codes of the nearest one, Princeton (0.0 miles). A town on an area-code boundary can differ from its neighbour.

East Rocky Hill in numbers

About 235 people live in East Rocky Hill, in 106 households. The median household income is $211,731 a year, 2.0 times the New Jersey median of $103,556 (US: $80,734). The median owner-occupied home is valued at $844,800 (86% above the New Jersey median). The median age is 59.2; 77.1% of adults 25 and over hold a bachelor's degree or higher (43.6% across New Jersey); the average commute takes 22 minutes.

Population235East Rocky Hill235
Households106East Rocky Hill106
Median age59.2East Rocky Hill59.2New Jersey40.1US 38.9
Median household income$211,731East Rocky Hill$211,731New Jersey$103,556US $80,734
Median home value$844,800East Rocky Hill$844,800New Jersey$454,400US $332,700
Bachelor's degree or higher77.1%East Rocky Hill77.1%New Jersey43.6%US 35.7%
Mean commute21.9 minEast Rocky Hill21.9 minNew Jersey30.5 minUS 26.4 min
Population density56 / sq miEast Rocky Hill56 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place East Rocky Hill CDP. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes covering East Rocky Hill

These ZIP codes cover part of East Rocky Hill but are addressed as somewhere else.

ZIP codes overlapping East Rocky Hill
ZIP City Type Population Median income Median home
08540 Princeton , NJ Standard 50,388 $176,983 $767,900

Map of East Rocky Hill ZIP codes

08540

The ZIP codes of East Rocky Hill, NJ, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near East Rocky Hill

The nearest larger towns are Rocky Hill (819 people, 1.5 mi), Ten Mile Run (2,492 people, 1.7 mi) and Griggstown (812 people, 2.0 mi).

Towns near East Rocky Hill
TownPopulationDistance
Heathcote 7,717 2.7 mi
Kendall Park 10,011 2.9 mi
Monmouth Junction 9,141 4.2 mi
Belle Mead 6,394 4.2 mi
Franklin Park 13,211 4.5 mi
Blackwells Mills 10,301 4.6 mi
Princeton 30,756 4.7 mi
Six Mile Run 2,882 5.8 mi
Plainsboro Center 2,773 6.0 mi
Princeton Meadows 15,561 6.2 mi
Dayton 7,952 6.3 mi
Hillsborough 22,585 6.7 mi
Manville 10,921 8.8 mi
Somerset 22,720 8.9 mi

More nearby: every ZIP code in Mercer County · New Jersey ZIP codes

Cite this page

zipcodes.pro. “East Rocky Hill, NJ ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/nj/east-rocky-hill

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