New Jersey (USA) is 5.3 times larger than Kings County, California.
New Jersey is a state in the Northeastern and Middle Atlantic regions of the United States. It is bordered on the north and east by New York State, on the southeast and south by the Atlantic Ocean, on the west by Pennsylvania, and on the southwest by Delaware. Wikipedia
Area: 3,605 km2 calculated
Kings County is a county located in the U.S. state of California. It is located in the San Joaquin Valley, a rich agricultural region. The county seat is Hanford. Wikipedia