The Port Authority of New York and New Jersey Police Department, or Port Authority Police Department (PAPD), is a police department in New York and New Jersey. It protects all the property owned by the Port Authority of New York and New Jersey, and it enforces state and city laws. The PAPD is one of the largest police departments in the United States, with over 2000 members. The PAPD is owned by the Port Authority of New York and New Jersey, a two-state agency that runs the bridges, tunnels, airports, and seaports along the New York - New Jersey border.