The Isaac Greenwood House is a historic house on New Hampshire Route 101 in eastern Dublin, New Hampshire. The oldest portion of this house was built c. 1784 by Isaac Greenwood, a veteran of the American Revolutionary War. It was a 1.5 story wood frame Cape style house with a large central chimney. This structure was raised to a full two stories in the early 19th century, and a large ell, offset from the side of the house, was added c. 1885. The interior of the oldest portion has retained some of its period finishes, and represents a good example of a local vernacular farmhouse.