Burlington County is a county located in the U.S. state of New Jersey. The county seat is Mount Holly Township. 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. 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, making it the 11th-most populous county in the state. The largest municipality in the county is Evesham Township. 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.
Burlington county is part of the Delaware Valley area, located east of the river. However, the county stretches across the state, and its southeast corner almost reaches the Atlantic Ocean.