Ancient World Mapping Center (UNC Chapel Hill)
Brooklyn Revealed interactive, historical Brooklyn map with photographs (New York Historical Society)
Cities and Towns maps of US and international cities (Library of Congress)
New York City Map including public facilities, landmarks, municipal boundaries (NYC.gov)
New York Historical Society Map Collection broad geographic and historical scope (New York Historical Society)
NYC Fire Insurance, Topographic and Property Maps (New York Public Library)
NYC Atlases (New York Public Library)
U.S. Historical Topographic Maps (U.S. Geological Survey)