Florence Township is a township in Burlington County, in the U.S. state of New Jersey. As of the 2020 United States census, the township's population was 12,812, an increase of 703 from the 2010 census count of 12,109, which in turn reflected an increase of 1,363 from the 10,746 counted in the 2000 census. The township, and all of Burlington Cou…Florence Township is a township in Burlington County, in the U.S. state of New Jersey. As of the 2020 United States census, the township's population was 12,812, an increase of 703 from the 2010 census count of 12,109, which in turn reflected an increase of 1,363 from the 10,746 counted in the 2000 census. The township, and all of Burlington County, is a part of the Philadelphia-Reading-Camden combined statistical area and the Delaware Valley.