Mercer County New Jersey Property Search
Use our property lookup tool to find Mercer County, New Jersey property records by owner name, parcel number, city, or street address (for example: 78th St E). Instantly access key details such as property ownership, assessed values, parcel information, and local tax rates in one convenient search.
New Jersey County Property Search
The property assessments in Mercer County are conducted by local municipal Tax Assessors under the supervision of the Mercer County Board of Taxation and the NJ Division of Taxation. The county includes total 110,612 parcels, 138,400 matched buildings, 116,211 addresses, and 41,314 secondary-address parcels, with standardized zoning across all 12 municipalities, ensuring accurate valuations, fair taxation, and consistent property record management. The Tax Assessor plays a key role in determining each property’s market value and maintaining current assessment records.
Mercer County ZIP Codes & Cities
Search your city or ZIP below to quickly find locations within Mercer County, New Jersey.
Mercer County New Jersey Property Overview
Mercer County, New Jersey has a diverse real estate market with 94,840 residential and 5,420 commercial properties. The average single-family home is about 63 years old with 1,855 sq ft of space. In 2026, the county recorded 563 residential sales, while 45.38% of homes are equity-rich. The effective property tax rate is 1.75%, with 108 foreclosure filings reported in 2026.
Residential Properties
94,840
Commercial Properties
5,420
Avg. Home Age Single Family
63 Years
Avg. Square Feet Single Family
1,855
Residential Sales 2026
563 YTD
Homes Seriously Underwater
1.72%
Residential Sales 2025
4,656
Equity Rich Homes percentage
45.38%
Effective 2025 Property Tax
1.75%
Total Foreclosure Filings 2026
108 YTD
Nearby Counties
Mercer County, New Jersey, is centrally located, connecting North and South Jersey, and bordered by Hunterdon, Somerset, Middlesex, Monmouth, Burlington, and Bucks County, PA. Home to Trenton and Princeton, it boasts vibrant communities, rich history, and key economic hubs.
Popular Cities
Mercer County, New Jersey features several vibrant communities, with Hamilton Township, Trenton, and Ewing Township as its most prominent cities. These areas highlight the county’s diverse residential, commercial, and cultural landscape, offering a mix of historic neighborhoods, modern amenities, and strong community growth, making them key hubs in Mercer County.
64,742 properties
Trenton City
9,852 properties
Lawrence Township
16,433 properties
Princeton City
How To Search Property In Mercer County New Jersey
By Owner Name
Using our Mercer County property search tool, quickly look up property records by owner name and instantly view comprehensive ownership and property details.
Search By Address
With our Mercer County property lookup tool, search by property address to instantly view parcel information, estimated home value, and detailed tax records.
Search By Parcel
This Mercer County parcel search tool lets you find properties by parcel number and view precise boundary lines along with complete property record details.
Search By Zip Code
Mercer County property search tool enables searching by ZIP code to explore local properties, neighborhood insights, and detailed tax information quickly.
Mercer County New Jersey Property Market Trends (2024–2025)
Mercer County’s real estate market remained active in 2024–2025, showing steady residential sales and shifting foreclosure activity. Median home prices reached $381,000 with an average down payment of $61,500. In February 2025, 254 homes were sold, supported by 205 purchase loans, 196 refinances, and 109 HELOCs. Foreclosure filings totaled 61, with 39 foreclosure starts, reflecting changing market conditions. Single-family homes maintain solid equity, and the county’s blend of historic neighborhoods and growing communities continues to support a stable and attractive housing environment.
Mercer County Property Market Trends (2025)
Mercer County New Jersey Property Data Insights
Mercer County maintains extensive property records, encompassing total 110,612 parcels with verified buildings, secondary addresses, and standardized zoning information. Updated on March 10, 2026, this dataset provides accurate land, building, and zoning details, enabling homeowners, buyers, and investors to make informed decisions about property values, development potential, and real estate trends throughout the county.
Parcels Overview
Mercer County’s database maintains comprehensive records for total 110,612 parcels, encompassing all residential and commercial properties. We ensure all lots are linked to precise, authoritative data for accurate property analysis.
Data Refresh & Updates
Mercer County’s database provides comprehensive records for 110,612 parcels, integrating State GIS and MOD-IV systems for maximum accuracy. These authoritative datasets ensure reliable land-use and valuation insights. Updated June 2026, our mapping links every valid lot to standardized property information, empowering homeowners, investors, and researchers with the most current, high-fidelity spatial data across the county.
Matched Buildings Data
Mercer County features 138,400 building footprints seamlessly linked to parcel records for enhanced structural analysis. Updated through March 2026, this database provides high-fidelity insights into regional property development.
These precise, authoritative connections support accurate assessments, GIS mapping, and planning efforts. Investors and researchers rely on this integrated data for reliable, up-to-date real estate insights across the county.
Secondary Address Matching
Mercer County features 41,314 secondary records, including units, suites, and apartments linked to parcel data. Updated as of May 2026, this layer significantly improves geocoding and property identification accuracy. These comprehensive address links ensure reliable mapping for condos and multi-family properties. Professionals rely on this integrated data for precise property analysis and efficient real estate management across the county.
Standardized Zoning Coverage
Mercer County provides 100% coverage for 110,612 parcels, featuring normalized zoning codes and municipal boundaries. Updated as of February 2026, this database ensures consistent land-use classification and analysis.
These standardized zoning attributes empower planners and analysts to conduct reliable GIS workflows. This high-fidelity dataset serves as an essential tool for accurate property assessments and comprehensive regional development research.
Note: Property tax rates are effective averages and may vary by municipality. For official and the most current figures, please consult the Mercer County Board of Taxation.
Mercer County New Jersey Cities Overview (2026 Estimates)
Mercer County, New Jersey’s 2026 cities overview shows it comprises 13 incorporated municipalities with a total estimated county population of about 385,000 in 2026. The largest township is Hamilton with approximately 96,013 residents, followed by Trenton, Ewing, West Windsor, and Princeton, reflecting a mix of urban centers and suburban communities across the county.
| Rank | City | Population (2024 Est.) | Previous (2020) | Growth % | Density (per sq mi) | Area (sq mi) | Type |
|---|
FAQ's
How can I search for property information in Mercer County?
Searching Mercer County Property Records
Our advanced search tool allows you to instantly find detailed information on 110,612 parcels across Mercer County. Whether you are a homeowner, investor, or researcher, you can search by:
Street Address
Owner Name
Parcel/Block & Lot Number
ZIP Code
Integrated with State GIS and MOD-IV data (updated June 2026), our platform provides authoritative access to assessment values, tax records, and structural details. Experience seamless, high-fidelity property lookups designed for accuracy, reliability, and ease of use.
When and how are property assessments conducted in Mercer County?
Assessments are conducted annually by municipal tax assessors. They analyze market trends, recent property sales, and building improvements to determine accurate, equitable valuations for local property taxation.
What are the due dates for paying property taxes?
In New Jersey, property taxes are paid quarterly. Due dates are February 1, May 1, August 1, and November 1. Please verify specific grace periods directly with your local municipal tax collector.
How are property taxes calculated in Mercer County?
Property taxes are calculated by multiplying your property’s assessed value by the local tax rate. This rate is determined by municipal, school, and county budget requirements.
Adjustments may apply based on exemptions, assessment ratios, and local levies. Accurate valuations ensure equitable taxation across all residential and commercial properties within the county.
What property notices should residents expect in Mercer County?
Residents should expect annual valuation notices detailing assessed property values, alongside official quarterly tax bills and, if applicable, added assessment bills in October for recent structural property improvements.
Stay informed to ensure timely payments and preserve your right to appeal.