 Lock Haven is the county seat of Clinton County . According to the United States Census Bureau , the city has a total area of 2 @.@ 7 square miles ( 7 @.@ 0 km2 ) , 2 @.@ 5 square miles ( 6 @.@ 5 km2 ) of which is land . About 0 @.@ 2 square miles ( 0 @.@ 5 km2 ) , 6 percent , is water . 
