Massachusetts · FIPS 25017 · County seat: Cambridge and Lowell
Middlesex County, MA GIS & Parcel Viewer
Use this page to reach the official statewide parcel map for Middlesex County, Massachusetts. The button below opens MassGIS Interactive Property Map in a new tab, so you can look up parcels by address, owner or parcel number on the source site itself.
Open the Middlesex County statewide map ↗
Opens experience.arcgis.com in a new tab. We link out and never embed or copy parcel data.
Middlesex County at a glance
| Official map | MassGIS Interactive Property Map |
|---|---|
| Type | Statewide map (covers all of Massachusetts) |
| Website | experience.arcgis.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Cambridge and Lowell |
| Population | 1,623,952 (2023 Census Bureau estimate) |
| Land area | 818 sq mi |
| FIPS code | 25017 |
Where the parcel data comes from
Middlesex County doesn't have its own viewer in our directory, so we point you to a statewide map: MassGIS Interactive Property Map. Zoom in on Middlesex County to see its parcels. Because a state agency compiles this layer from local data, check with the Middlesex County assessor or recorder before relying on a recent change. When we tested the link in October 2026 it opened with no login and no fee.
Searching for a parcel, step by step
- Open the statewide map with the button above.
- Search for an address in Middlesex County, or zoom to the county on the map.
- Click a parcel to see the attributes the state layer includes.
- Write down the parcel number and use it for records searches with the Middlesex County assessor or recorder.
Rural addresses don't always geocode well. When that happens, zoom in by hand and click the parcel, or search by owner name.
Middlesex County by the numbers
Census Bureau figures put Middlesex County at about 1,623,952 people (2023 estimate) on roughly 818 square miles of land, which is about 1,985 residents per square mile. That makes it the most populous of Massachusetts's 14 counties. The county has two seats: Cambridge and Lowell.
Counties next to Middlesex County
If the property sits near a county line, the parcel may belong to a neighbor. These counties border Middlesex County:
Maps vs. surveys
Keep in mind that a GIS parcel layer is a tax map, not a survey. For exact boundaries, look at the recorded deed and plat or hire a licensed land surveyor.