The Ramapo Reformed Church followed two German Lutheran meeting houses that stood about 1720-1739 in an area known as the “Island.” Dutch Calvinists arrived in the middle of the eighteenth century and, in 1785, organized the Dutch Reformed Congregation at Ramapough in Bergen County. In 1798, the Dutch Reformed and Lutherans built the present church and shared it with “1 lock and 2 keys” until the Lutherans departed in 1848 to build a church at Airmont, N.Y. Before the railroad came in the mid-1800’s, the “Island” was the center of Mahwah. Also known as the “Island Church” or “Community Church,” it is the older of the two remaining wood-frame Federal period church buildings in Bergen County and the only surviving early church building in the county with a history of shared ownership and use. In 1985, the Ramapo Reformed Church marked 200 years of continuous ministry.