Fairfield County is located in the southwestern corner of the U.S. State of Connecticut. As of the 2010 census, the county's population was 916,829. The county has a total area of 2,168 km² (837 mi²). 1,621 km² (626 mi²) of it is land and 547 km² (211 mi²) of it is water. The total area is 25.23% water.