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 524,306 mapped parcels. The median assessed value is $715,300. The median lot size is 0.29 acres. 7,797 parcels are 10 acres or larger. Of the parcels with a recorded build year, half were built in 1958 or earlier. The records carry 451,255 distinct owner names. About 3% of parcels list an owner mailing address outside Massachusetts. Owner names, mailing addresses, site addresses and assessed values are on nearly every parcel. Lot sizes reach 79.6%. 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 1,632,002 residents in 2020. That was 8.6% higher than in 2010. Middlesex County added 166,606 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 1,996 people per square mile. Some of the county's most populated postal areas include Malden, Medford and Everett.

Population Trend in Middlesex County MA

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

Middlesex County Zip Codes

Middlesex County has 81 zip codes. Some of the county's most populated zip codes include Malden (02148), Medford (02155) and Everett (02149). Malden is the largest zip by population, with about 66,274 residents or 4% of the county total. Together, the three largest zips account for about 11% of all county residents based on 2020 population estimates.

Most Populated Zip Codes in Middlesex County MA

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

Middlesex County Demographics

Middlesex County has a median age of 38.9, which makes the county a little younger than Massachusetts overall. About 19.6% of residents are under 18, while 16% 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 35.2% of the population, which points to a solid working-age base. About 59% of adults have a bachelor's degree or higher, above the statewide figure of 46.6%. The county is majority White by population, with Hispanic, Asian, Black and multiracial residents making up a meaningful share of the local mix.

Key Demographics for Middlesex County MA

Middlesex County School Districts

Middlesex County is served by 44 public school districts with 191,971 students enrolled in 2024. The largest districts on the county map are Lowell, Newton and Framingham. Those three districts account for about 18% 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 MA

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 $687,200 and a median gross rent of $2,126. About 62% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run above the Massachusetts median, while rents come in above the state average. In March 2026, the median listing price was $908,675 and homes spent about 21 days on the market.

Businesses in Middlesex County, MA

Middlesex County has 64,823 business listings across 1,304 categories. The largest categories in Middlesex County business listings are Real Estate Agents (1,314, 2.0%), Contractors (1,041, 1.6%), and Landmark And Historical Building (964, 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, MA

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 Massachusetts — explore the full structure before you buy.