County · code 25007
Dukes CountyMassachusetts
Dukes County is a county in Massachusetts with its seat in Edgartown, created in 1695 from the Martha's Vineyard and Elizabeth Islands area.
- Founded1695
- County seatEdgartown
- Named forDuke of York
- Land area103 sq mi + 388 sq mi water
- Population20,600 2020 Census
- Parcels mapped21,423 checked 15 October 2026
Where it is
Dukes on the map of Massachusetts
Massachusetts has 14 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Founded in 1695
An old deed may name a county that no longer exists, or a boundary that has since moved.
Dukes County was created on June 22, 1695, from non-county area in the Massachusetts Bay Colony, consisting of Martha's Vineyard and the Elizabeth Islands. The county was named after the Duke of York.
- 1695Dukes County created Dukes created from non-county area in Massachusetts Bay Colony (Martha's Vineyard and the Elizabeth Islands). · Mass. Col. Acts, vol. 1, ch. 7 [1695-1696]/p. 216
Land and parcels
What the maps cover in Dukes
Who publishes each layer, how good it is, and when we last checked.
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Parcels Good enough
Lot lines and tax-map numbers for 21,423 parcels from MassGIS (Bureau of Geographic Information), Commonwealth of Massachusetts. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
checked 15 October 2026 -
Address points Official
One point per address, 21,001 in all from MassGIS.
checked 14 October 2026 -
Buildings Reference
Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026
- Official
- from the office that keeps the record
- Good enough
- a reliable statewide or national copy
- Fallback
- a guide only; check the official record
- Missing
- nothing public found yet
People and land
Dukes by the Census
Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.
Rules and offices
Dukes County's official site
We have found the county's site but not its offices yet; start there.
In Massachusetts, permits, zoning and assessing are handled by each city or town, not the county, and deeds are recorded at the county's registry of deeds (search the registries).
County government
- County government
The official website of Dukes County.
See your own lot on these maps
Open Dukes County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.
Questions
Common questions about Dukes County
- When was Dukes County founded?
- Dukes County was founded in 1695, and named after Duke of York.
- What is the county seat of Dukes County?
- The county seat of Dukes County is Edgartown.
- Is there an online parcel map for Dukes County?
- Yes. MassGIS (Bureau of Geographic Information), Commonwealth of Massachusetts publishes a parcel map of 21,423 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Dukes County's boundary or name changed?
- Dukes County was created in 1695. The Atlas of Historical County Boundaries records no boundary change since.
- Is my lot in a flood zone?
- We do not have flood maps for Dukes County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby