According to the U.S. Census Bureau , the county has a total area of 907 square miles ( 2,350 km2 ) , of which 876 square miles ( 2,270 km2 ) is land and 31 square miles ( 80 km2 ) ( 3.5 % ) is water .
The county has a total area of 907 square miles ( 2,349.1 km2 ) .