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/HAMILTON-SQUARE

Hamilton Square ZIP codes, New Jersey

No ZIP code is named for Hamilton Square, NJ; addresses there use a neighbouring town's name. 2 ZIP codes cover it: 08690 and 08691. Its area codes are 609 and 640.

USPS city name
0 ZIP codes
Overlapping the city
2 more
Population
11,622
Area codes
609, 640

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

Hamilton Square in numbers

About 11,622 people live in Hamilton Square, in 4,265 households. The median household income is $138,162 a year, 33% above the New Jersey median of $103,556 (US: $80,734). The median owner-occupied home is valued at $397,000 (13% below the New Jersey median), and median gross rent is $2,139 a month. The median age is 44.9; 46.4% of adults 25 and over hold a bachelor's degree or higher (43.6% across New Jersey); the average commute takes 26 minutes.

Population11,622Hamilton Square11,622
Households4,265Hamilton Square4,265
Median age44.9Hamilton Square44.9New Jersey40.1US 38.9
Median household income$138,162Hamilton Square$138,162New Jersey$103,556US $80,734
Median home value$397,000Hamilton Square$397,000New Jersey$454,400US $332,700
Median gross rent$2,139Hamilton Square$2,139New Jersey$1,720US $1,413
Bachelor's degree or higher46.4%Hamilton Square46.4%New Jersey43.6%US 35.7%
Mean commute25.5 minHamilton Square25.5 minNew Jersey30.5 minUS 26.4 min
Population density2,718 / sq miHamilton Square2,718 / sq mi

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

ZIP codes covering Hamilton Square

These ZIP codes cover part of Hamilton Square but are addressed as somewhere else.

ZIP codes overlapping Hamilton Square
ZIP City Type Population Median income Median home
08690 Trenton , NJ Standard 18,841 $127,339 $383,900
08691 Trenton , NJ Standard 16,607 $132,520 $552,000

Map of Hamilton Square ZIP codes

0869008691

The ZIP codes of Hamilton Square, 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 Hamilton Square

The nearest larger towns are Mercerville (13,535 people, 2.3 mi), Trenton (90,338 people, 6.0 mi) and Princeton Meadows (15,561 people, 8.9 mi).

Towns near Hamilton Square
TownPopulationDistance
Robbinsville Center 3,777 1.1 mi
Mercerville 13,535 2.3 mi
Yardville 6,301 2.7 mi
White Horse 10,507 3.5 mi
Groveville 3,100 3.8 mi
Trenton 90,338 6.0 mi
Bordentown 4,026 6.0 mi
Morrisville, PA 9,752 7.0 mi
Lawrenceville 3,924 7.1 mi
Hightstown 5,920 7.2 mi
The College of New Jersey 3,658 7.4 mi
Plainsboro Center 2,773 8.0 mi
Twin Rivers 8,382 8.8 mi
Princeton Meadows 15,561 8.9 mi

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

Cite this page

zipcodes.pro. “Hamilton Square, NJ ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/nj/hamilton-square

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