U.S. National Historic Landmarks

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Most landmark designations are in one of the 50 states. New York is the state with the most (267), and New York City, with 113 designations, is the city with the largest number of designations. Of the states, North Dakota has the fewest designations with six. Three cities (New York City, Philadelphia, and Boston) have enough listings to warrant lists separate from their respective states.
A small number of designations have been made outside the 50 states. Most of these appear in United States possessions. The Virgin Islands have five listings, Puerto Rico has four, and island possessions in the South Pacific have six. Five listings are found in Pacific island nations with which the U.S. has established a free association agreement, and one listing, the American Legation in Tangier (the nation’s first foreign public property), is found in the unaffiliated Kingdom of Morocco.