National Register of Historic Places listings in Middlesex County, Massachusetts
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This is a listing of places in Middlesex County in the U.S. state of Massachusetts that are listed in the National Register of Historic Places. With more than 1,300 listings, the county has more listings than any other county in the United States.
Barnstable | Berkshire | Bristol | Dukes | Essex | Franklin | Hampden | Hampshire | Middlesex | Nantucket | Norfolk | Plymouth | Suffolk | Worcester |
ā ā This National Park Service list is complete through NPS recent listings posted July 19, 2024.[1]