Randolph County is the largest by area at 1,040 square miles (2,694 km 2 ), and Hancock County is the smallest at 83 square miles (215 km 2 ).  Kanawha County contributed land to the founding of 12 West Virginia counties  and has the largest population (193,063 in 2010). Wirt County has the smallest population (5,717 in 2010).  The oldest county is Hampshire , established in 1754, and the newest is Mingo, established in 1895.  Spruce Knob , located in Pendleton County , is the state's highest point at 4,863 feet (1,482 m).  Federal Information Processing Standard (FIPS) codes, which are used by the United States government to identify counties uniquely, are five-digit numbers. For West Virginia, they start with 54 and end with the three-digit county code (for example, Barbour County has FIPS code 54001). Each county's code is provided in the table below, linked to census data for that county.