Ringwood Manor, located in Passaic County, New Jersey, was the site of an ironworks and home to a number of well-known ironmasters from the 1740s to the late 19th century.

He began building the present Manor House in 1807 while still operating the iron mines and forges on the property.

For the next half century, Ryerson ran five forge-furnace complexes in three counties from his headquarters at Ringwood.

One of the Manor's last owners was Cooper's son-in-law, Abram S. Hewitt, ironmaster, educator, lawyer, U.S.

A 479-acre (194 ha) area including the manor house was declared a National Historic Landmark District in 1966.