Burlington is a city in Burlington County, New Jersey, United States and a suburb of Philadelphia. As of the 2010 United States Census, the city's population was 9,920, reflecting an increase of 184 from the 9,736 counted in the 2000 Census, which had in turn declined by 99 from the 9,835 counted in the 1990 Census.Burlington was first incorporated on October 24, 1693, and was reincorporated by Royal charter on May 7, 1733. After American independence, the city was incorporated by the State of New Jersey on December 21, 1784. On March 14, 1851, the city was reincorporated and enlarged with portions of the surrounding township.Burlington was originally the county seat of Burlington County but in 1796, as the population had been increasing to the east away from the Delaware River, the county seat was moved to Mount Holly Township, a more central location.