Maine · FIPS 23013 · County seat: Rockland
Knox County, ME GIS & Parcel Viewer
Knox County, Maine parcel data lives on Maine GeoLibrary Parcel Viewer. Open it below in a new tab, then use the short steps on this page to find a property fast.
Open the Knox County statewide map ↗
Opens maine.maps.arcgis.com in a new tab. We link out and never embed or copy parcel data.
Quick facts
| Official map | Maine GeoLibrary Parcel Viewer |
|---|---|
| Type | Statewide map (covers all of Maine) |
| Website | maine.maps.arcgis.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Rockland |
| Population | 40,977 (2023 Census Bureau estimate) |
| Land area | 365 sq mi |
| FIPS code | 23013 |
Where the parcel data comes from
This is a statewide map, not a county site. Maine GeoLibrary Parcel Viewer covers parcels across Maine, and Knox County is one part of it. Because a state agency compiles this layer from local data, check with the Knox County assessor or recorder before relying on a recent change. Our October 2026 check found the map open to the public, with no account or payment needed.
How to use the Knox County viewer
- Open the statewide map with the button above.
- Search for an address in Knox 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 Knox 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.
About Knox County
Census Bureau figures put Knox County at about 40,977 people (2023 estimate) on roughly 365 square miles of land, which is about 112 residents per square mile. Among Maine's 16 counties, it is the 10th largest by population. Another 779 square miles of water fall within its lines, according to Census mapping. The county seat is Rockland.
Neighboring counties
Parcels close to the edge of Knox County can fall in the next county over. Neighboring counties:
A note on accuracy
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.