List of New York State Historic Markers in Sullivan County, New York Listings county-wide Listings county-wide

| blank | Marker_name | Location_ | City_or_Town | Marker_text_ |
|---|---|---|---|---|
| 28 | Fort Devens | On US 209 About 1½ Miles North of Wurtsboro | Mamakating, New York | 1757 - One of Chain of Forts Built Under Supervision of James Clinton, Later General Clinton, During French & Indian War |
| 29 | Michel Helm | On US 209 About 2 Miles North of Wurtsboro | Mamakating, New York | Killed And Scalped Here During French And Indian War, While On Way From Visiting His Daughter At Minisink, To His Home In Rochester |
| 30 | Roosa Fort | On Town Rd. at Roosa Gap | Mamakating, New York | Building Started Before Revolutionary War. Later Owned And Completed By Abraham Roosa Or Son Jacob Who Lived In Cabin On Hill |
| 31 | Westbrook Fort | On US 209 At Westbrookville | Mamakating, New York | And House Built About 1750-60 By Tjerck Van Keuren Westbrook. Village of Westbrookville Named In His Honor |