Town guide · Mercer County
Living in Hamilton, NJ
Hamilton is the largest town in Mercer County by population, about 40 square miles wrapped around the east and south sides of Trenton. It is a township of named villages like Hamilton Square, Mercerville, Yardville and White Horse. It has a Northeast Corridor train station, three interstates, Veterans Park and Grounds For Sculpture.
- County
- Mercer
- Population
- About 92,300 (2020 census), the most in Mercer County
- Size
- About 40 square miles
- Setting
- Suburban neighborhoods and older village centers, with commercial corridors and large parks
- Main roads
- Interstate 295, Interstate 195, the New Jersey Turnpike, U.S. Routes 130 and 206, and Routes 29, 33 and 156
First things first
Which Hamilton, and which address?
There is more than one Hamilton Township in New Jersey. This guide covers Hamilton Township in Mercer County, next to Trenton, not Hamilton Township in Atlantic County.
Inside Hamilton, homes carry many different mailing addresses. The township uses nine ZIP codes, some shared with Trenton and neighboring towns, so the name on the envelope may say Trenton, Hamilton, Mercerville or another place depending on the street. Mercerville (08619), Hamilton Square, Yardville, White Horse and Groveville are all sections of Hamilton, not separate towns. We confirm the municipality and the block and lot on every property.
Neighborhoods
A township of villages
Hamilton was incorporated in 1842 from part of the old Nottingham Township. Its name comes from the village of Hamilton Square, which may have been named for Alexander Hamilton. Five of its villages are large enough that the Census Bureau counts them as their own communities.
- Hamilton Square: The village that gave the township its name, and one of its five census designated places.
- Mercerville: One of the township's census designated places, and a mailing address many Hamilton homes carry.
- Yardville, Groveville and White Horse: The other three census designated places, each a section of Hamilton rather than a separate town.
- Other named places: Older names still in use include Bromley, Nottingham, Golden Crest, Edgebrook, Extonville, Duck Island, Quaker Bridge, Rosemont and Yardville Heights, among many others.
Homes
What you will find
- Older homes near the village centers: On established streets in and around the old villages, such as Hamilton Square, and on the blocks closer to Trenton.
- Single family neighborhoods: Filling much of the land between the old village centers.
- Townhouses and condominiums: Association communities in several parts of the township, each with its own bylaws and fee schedule.
Worth knowing: Hamilton is big, and its sections price very differently, so a township average is close to useless for one house. The township borders the Delaware River, and homes near the river and its creeks should be checked against current FEMA flood maps. In association communities, ask for the bylaws and fee schedule before you sign anything.
Property taxes
What taxes look like in Hamilton
- 2.434%2025 effective tax rate, as a share of market value
- $8,0692025 average residential tax bill
A home worth $350,000 on today's market would pay roughly $8,519 a year at Hamilton's 2025 effective rate. Your actual bill depends on your assessment, so we pull the real tax record for any home you are considering.
Source: New Jersey Division of Taxation, 2025 general and effective tax rates. Rates are set each year.
Getting around
Roads and commuting
Hamilton is the only town in New Jersey with Interstate 95 (the New Jersey Turnpike) and both of its auxiliary routes, Interstate 195 and Interstate 295. The Turnpike has no exit in the township, but its Woodrow Wilson and Richard Stockton service areas are here, and the nearest interchange, Exit 7A, is just east in Robbinsville. U.S. Routes 130 and 206 and Routes 29, 33 and 156 also cross the township. Hamilton station, on Sloan Avenue off Interstate 295, is on NJ Transit's Northeast Corridor Line with trains to Newark and New York Penn Station and south to Trenton. NJ Transit buses run to Trenton and Philadelphia. Daily shopping is spread along Route 33, Route 130 and the other main corridors.
Places worth knowing
Parks, landmarks and open space
- Veterans Park: A township park of about 350 acres, entirely inside Hamilton.
- Grounds For Sculpture: A 42 acre sculpture park and garden in the township.
- Sayen House and Gardens: A botanical garden on the former home and land of Fredrick Sayen.
- Kuser Park and Mansion: A township park and historic mansion, home of the December Winter Wonderland event.
- Tulpehaking Nature Center: A Mercer County Park Commission nature center on Westcott Avenue.
Common questions
Questions people ask us about Hamilton
What are property taxes in Hamilton, NJ?
Hamilton Township's 2025 effective tax rate is 2.434 percent of market value, and the average residential tax bill is $8,069, according to the New Jersey Division of Taxation. Actual bills depend on each home's assessment.
Is Mercerville part of Hamilton?
Yes. Mercerville is a census designated place inside Hamilton Township, along with Hamilton Square, Yardville, White Horse and Groveville. Homes there pay Hamilton Township property taxes, even when the mailing address says Mercerville or Trenton.
Is there a train station in Hamilton?
Yes. Hamilton station on Sloan Avenue, just off Interstate 295, is on NJ Transit's Northeast Corridor Line. Trains run north to Newark, Secaucus and New York Penn Station and south to Trenton, where SEPTA trains continue to Philadelphia.
Is Hamilton the biggest town in Mercer County?
By population, yes. About 92,300 people lived in Hamilton Township at the 2020 census, the most of any Mercer County municipality. By land area it ranks second in the county.
Is there a Turnpike exit in Hamilton?
No. The New Jersey Turnpike crosses Hamilton, and the Woodrow Wilson and Richard Stockton service areas are in the township, but the nearest interchange is Exit 7A on Interstate 195 in neighboring Robbinsville.
Buying or selling in Hamilton?
Every section of Hamilton is its own market
Hamilton has nine ZIP codes and five census communities inside one township. We start by confirming exactly where your home sits, then walk you through what it could sell for and the different ways to sell it.
Call or text either of us directly.