Burlington County is a county located in the U.S. state of New Jersey. The county seat is Mount Holly Township. As of the 2010 United States Census, the population was 448,734, an increase of 25,340 (6.0%) from the 423,394 enumerated in the 2000 Census, retaining its position as the 11th-most populous county in the state. The most-populous place was Evesham Township, with 45,538 residents at the time of the 2010 Census, while Washington Township covered , the largest total area of any municipality. The Bureau of Economic Analysis ranked the county as having the 158th-highest per capita income of all 3,113 counties in the United States (and the 11th-highest in New Jersey) as of 2009.
Anglo-European records of Burlington County date to 1681, when its court was established in the Province of New Jersey. The county was formed on May 17, 1694, "by the union of the first and second Tenths." The county was named for the Bridlington, a town in England. The county seat had been in Burlington but, as population increased in the interior, away from the Delaware River, a more central location was needed, and the seat of government was moved to Mount Holly in 1793.
Burlington County is part of the Delaware Valley area, located east of the Delaware River. However, the county stretches across the state, and its southeast corner reaches tidal estuaries leading to southern New Jersey's Great Bay, which separates the county from the Atlantic Ocean.