The Jay Estate is a 23-acre park and historic site in Rye, New York, with the 1838 Peter Augustus Jay House at its center. It is the keystone of the Boston Post Road Historic District, a National Historic Landmark District (NHL) created in 1993. The site is the surviving remnant of the 400-acre (1.6 km2) farm where US Founding Father, John Jay, grew up. It is also the place where Jay returned to celebrate the end of the American Revolutionary War, after he negotiated the 1783 Treaty of Paris with fellow peacemakers John Adams and Benjamin Franklin. The preserved property is located on the south side of the Boston Post Road and has a 3⁄4-mile (1.2 km) view of Milton Harbor.

John Jay was an American statesman, diplomat, abolitionist, signatory of the Treaty of Paris, and a Founding Father of the United States. He served from 1789 to 1795 as the first chief justice of the United States and from 1795 to 1801 as the second governor of New York. Jay directed U.S. foreign policy for much of the 1780s and was an important leader of the Federalist Party after the ratification of the United States Constitution in 1788.