The Ackerman–Demarest House is located at 605 East Saddle River Road in the borough of Ho-Ho-Kus in Bergen County, New Jersey, United States.

The historic stone house was built in 1757, by tradition.

It was added to the National Register of Historic Places on January 10, 1983, for its significance in architecture.

[1][3] It was listed as part of the Early Stone Houses of Bergen County Multiple Property Submission (MPS).

[4] According to the nomination form, William Cairns built a grist mill here in 1778.