Original: Geography According to the U.S. Census Bureau , the county has a total area of 1,412 square miles ( 3,658 km ² ) , of which , 1,118 square miles ( 2,897 km ² ) of it is land and 294 square miles ( 761 km ² ) of it ( 20.81 % ) is water .
Simplified: The county has a total area of 1,412 square miles ( 3,658 km ² ) . About 1,118 square miles ( 2,897 km ² ) of that is land , and 294 square miles ( 761 km ² ) of it ( 20.81 % ) is water .