The Davenport–Demarest House is a historic stone farmhouse located at 140 Changebridge Road in the township of Montville in Morris County, New Jersey. The oldest section was built c. 1720–1780. The farmhouse was documented by the Historic American Buildings Survey in 1938. It was added to the National Register of Historic Places on January 17, 1992, for its significance in architecture. It was listed as part of the Dutch Stone Houses in Montville Multiple Property Submission (MPS).

Humphrey Davenport (1656–1735) purchased land in the area starting in 1714. His son, Humphrey Davenport Jr. (1697–1770) sold his share to Robert Gould Sr. in 1734, before his father died. Gould was the first town clerk of Pequannock and a county judge. His son inherited the property and mortgaged it to John Salter in 1782. He sold it to Samuel Demarest in 1788. His son Lawrence Demarest owned it next. The oldest section of the house may have built as early as 1720 or as late as 1780. The stone farmhouse features local Dutch Colonial architecture. A frame wing was added in the 1920s.

• National Register of Historic Places listings in Morris County, New Jersey
• List of the oldest buildings in New Jersey

• Media related to Demarest Farmhouse (Montville, New Jersey) at Wikimedia Commons
• Historic American Buildings Survey (HABS) No. NJ-309, "Demarest Farmhouse, Changebridge Road, Montville, Morris County, NJ", 2 photos, 8 measured drawings, 3 data pages, supplemental material