Tappan (/təˈpæn/ tə-PAN) is a hamlet and census-designated place in the town of Orangetown, New York, United States.

[2] The Tappan tribe were a Lenape people who inhabited the region radiating from the Hudson Palisades and the New York – New Jersey Highlands at the time of European colonization in the 17th century.

When Great Britain imposed duties on the colonies and closed the port of Boston, local inhabitants passed resolutions calling for a boycott of British imports and exports on Monday, July 4, 1774, two years to the day before the Declaration of Independence was proclaimed.

Major André was brought to Tappan, confined at Caspurus Mabie's home, known as "Mabie's Inn," and brought to trial at the Reformed Church of Tappan; he was found guilty of espionage, hanged, and buried nearby.

Joshua Hett Smith, accused of conspiring with Major André, was also brought to trial at the Reformed Church of Tappan.

General George Washington, who in 1789 became the first president of the United States, used the 1700 DeWint House, Rockland County's oldest existing structure, as his headquarters four times between 1780 and 1783, and dined at Mabie's Inn during the American Revolution.

[4] According to the United States Census Bureau, the region has a total area of 2.8 square miles (7.3 km2), all land.

[11][12] The Erie Railroad ran train service on the Northern Branch through the eastern part of Tappan up to 1966.