New Fairfield is a town in Fairfield County, Connecticut, United States. The population was 13,579 at the 2020 census. New Fairfield is one of five towns that surround Candlewood Lake, the largest lake in Connecticut. The town is located 55 miles (89 km) northeast of New York City, making it part of the New York metropolitan area. The town is part of the Western Connecticut Planning Region.

Fairfield County is a county in the southwestern corner of the U.S. state of Connecticut. It is the most populous county in the state and was also its fastest-growing from 2010 to 2020. As of the 2020 census, the county's population was 957,419, representing 26.6% of Connecticut's overall population. The closest to the center of the New York metropolitan area, the county contains four of the state's top 7 largest cities—Bridgeport (1st), Stamford (2nd), Norwalk (6th), and Danbury (7th)—whose combined population of 433,368 is nearly half the county's total population.