Middlesex County GIS Maps

Middlesex County Maps

The maps below show a few of the county map styles included in our downloads. County packages include map exports in JPEG, PNG, SVG, PDF and GeoTIFF formats plus more than 20 GIS layers for mapping, research and analysis. Available layers include zip codes, area codes, subdivisions, school districts, political boundaries, roads, water features, points of interest and more.

County packages also include historical county demographics, business intelligence, analytical dashboards, AI-ready prompts, markdown files and related reference data. Everything is organized to save hours of manual work collecting current data, cleaning it and joining it together. That makes it easier to move faster on analytics, due diligence, business planning and location research. Paid packages are built for commercial use, but some package contents include source-specific attribution or notice guidance. Review Licensing & Data Source Notices.

Middlesex County Parcels

Middlesex County has 275,946 mapped parcels covering 178,162 acres. The median assessed value is $170,100. The median lot size is 0.17 acres. 2,899 parcels are 10 acres or larger. Of the parcels with a recorded build year, half were built in 1965 or earlier. About 2% of parcels list an owner mailing address outside New Jersey. Mailing addresses reach 88.1%. Site addresses reach 88.1%. Browse the interactive Middlesex County Parcel viewer here.

Middlesex County Parcel Data Coverage

Field coverage measured across all Middlesex County parcel records. Download free sample data here.

Middlesex County Population

Middlesex County had 863,162 residents in 2020. That was 6.6% higher than in 2010. Middlesex County added 113,000 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 2,791 people per square mile. Some of the county's most populated postal areas include Piscataway, Perth Amboy and New Brunswick.

Population Trend in Middlesex County NJ

Middlesex County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.

Middlesex County Zip Codes

Middlesex County has 36 zip codes. Some of the county's most populated zip codes include Piscataway (08854), Perth Amboy (08861) and New Brunswick (08901). Piscataway is the largest zip by population, with about 60,545 residents or 7% of the county total. Together, the three largest zips account for about 20% of all county residents based on 2020 population estimates.

Most Populated Zip Codes in Middlesex County NJ

Middlesex County Zip Code populations and trends per most recent census data.

Middlesex County Demographics

Middlesex County has a median age of 39.4, which makes the county a little younger than New Jersey overall. About 21.6% of residents are under 18, while 15.8% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 25 to 44 at about 33.4% of the population, which points to a solid working-age base. About 45.1% of adults have a bachelor's degree or higher, above the statewide figure of 42.9%. The county has a more diverse population mix, with no single race or ethnicity accounting for all of the local story.

Key Demographics for Middlesex County NJ

Middlesex County School Districts

Middlesex County is served by 24 public school districts with 129,100 students enrolled in 2024. The largest districts on the county map are Edison Township, Woodbridge Township and Perth Amboy City. Those three districts account for about 31% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, based on district totals from 2017 to 2024.

Largest School Districts by Enrollment in Middlesex County NJ

Middlesex County school district enrollment and trends per most recent NCES reporting data.

Middlesex County Housing & Real Estate

Middlesex County has a median home value of $439,300 and a median gross rent of $1,810. About 63% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the New Jersey median, while rents come in above the state average. In March 2026, the median listing price was $549,699 and homes spent about 32 days on the market.

Businesses in Middlesex County, NJ

Middlesex County has 28,910 business listings across 1,125 categories. The largest categories in Middlesex County business listings are Churches & Religious Organizations (438, 1.5%), Medical Offices (431, 1.5%), and Auto Repair (427, 1.5%). The full Middlesex County business listings dataset includes names, categories, addresses and contact details where available. Middlesex County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.

Top Business Categories in Middlesex County, NJ

Middlesex County Business Listings

Middlesex County business listings sourced from Overture Maps. Includes locations with a high level of confidence.

Middlesex County Basemaps

Middlesex County map and data packages include a set of useful basemaps to help you get started quickly. These include a custom light grey canvas, USGS topo, imagery and other reference layers that make it easier to build clear, meaningful county maps using the included GIS layers, your own data or both. Pre-rendered map tiles for the light grey basemap are included so you can use them offline or host them on your own CDN.

Preview a Live Package Demo

See exactly what is included in a county data package. Inspect how files are organized, the interactive data explorer and how maps and analytics are laid out. The demo loads a real sample package from New Jersey — explore the full structure before you buy.