Beaver Island State Park is a New York state park located on Grand Island in northwestern Erie County, New York, in the United States. It is situated at the southern end of the island on the bank of the Niagara River and served by the Beaver Island Parkway, a 2.72-mile (4.38 km) highway linking the park to Interstate 190 (I-190). The park features several amenities, including a USGA-recognized championship 18-hole, par-72 public golf course.