Fairfield County is located in the southwestern corner of the U.S. State of Connecticut. As of the 2020 census, the county's population was 957,419. 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.