Grassy Point (formerly known as North Haverstraw), was a hamlet on the west side of the Hudson River, in the Town of Stony Point in Rockland County, New York, United States. It was located north of West Haverstraw; east of Harriman State Park; south of Stony Point.
Grassy Point is a short peninsula extending into the Hudson River in the southeast part of the Town of Stony Point. In 1798 William Denning Sr., a wealthy New York lawyer, purchased the land. He later sold 10 acres (40,000 m2) at the south end of the property to another New York lawyer, William Smith, who built a large two story house and named it "Rosa Villa".
After the death of Denning, his property passed through the hands of Philip Verplanck, Isaac L. Pratt and Dr. Lawrence Proudfoot. In 1830 Proudfoot built the first steamboat landing at Grassy Point. Owing to the depth of water, it was the stopping place for steamers passing up and down the river. The first hotel at Grassy Point was kept by Dr. Proudfoot in a double house near the steamboat wharf. On the north side of that house was a small addition in which Proudfoot kept a small store and bar, and in which the first post office was opened.
The first post office at Grassy Point was opened on July 30, 1834, with James De La Montanya as postmaster. On August 21, 1834, the name of the office was changed to North Haverstraw, and it retained this name until September l0th, 1836, when it was changed back to Grassy Point. On September 5, 1845, the office was discontinued. The post office at Grassy Point was re-established with Alfred M. Wiles as postmaster on April 14, 1871.
In 1834, the steamboat General Jackson, owned by Jacob Vanderbilt, and plying between New York and Peekskill, blew up at Grassy Point. The boat was later rebuilt and subsequently sold to David P. Mapes who used it on the Kingston-New York run.
In 1845, O. C. Gerow opened a general country store in a building a few feet west of Proudfoot's house. In 1848, James Creney opened a hotel at the Point. The first lumber yard at the Point was started by Walter Fleet Brewster Gurnee & A. Gurnee and George H. Smith. In the spring of 1845, John I. Wiles moved from Orange County to Grassy Point with his family, and opened a shop for the purpose of doing business in the shape of blacksmith or wheelwright work. In 1871, a foundry was built which manufactured machinery for flour and saw mills and brick making.