Norwalk (pronounced nôr′wôk′), is the sixth most populous city in the U.S. state of Connecticut. According to the 2010 United States Census the city had a total population of 85,603; with an estimated population of 88,485 in 2015. Located in southwestern Connecticut in southern Fairfield County, also known informally as Connecticut's Gold Coast the city sits on the northern shore of Long Island Sound.