Oxford is a residential town located in western New Haven County, Connecticut, United States. The town is part of the Naugatuck Valley Planning Region. The population was 12,706 at the 2020 Census. Oxford is the 26th-wealthiest town in the state by median household income. Distinct settled areas in the town include Oxford Center, Quaker Farms, and Riverside. Oxford belongs to the Bridgeport–Stamford–Norwalk Metropolitan Statistical Area, a subregion of the New York metropolitan area.

New Haven County is a county in the south central part of the U.S. state of Connecticut. As of the 2020 census, the population was 864,835, making it the third-most populous county in Connecticut. Two of the state's top 5 largest cities, New Haven (3rd) and Waterbury (5th), are part of New Haven County.