Fairfield County is a county in the southwestern corner of the U.S. state of Connecticut, as well as its fastest-growing from 2010 to 2018 and largest in terms of population. As of the 2010 census, the county's population was 916,829, estimated to have increased by 3.6% to 949,921 in 2017, and decreased to 943,332 in 2019. The most populous county in the state, the county population represents a little over 25% of Connecticut's overall population and is one of its fastest-growing counties. The closest to the center of the New York metropolitan area, the county contains four of the state's largest cities–Bridgeport (1st), Stamford (3rd), Norwalk (6th), and Danbury (7th)–whose combined population of 433,368 is nearly half the county's total population.