Middlefield is a town located in Middlesex County, in the state of Connecticut (CT), United States. Nestled in the New England division of the North-east region, it covers an area of 12.7 square miles (33.0 km²) and sits at an elevation of 163 ft. With a population of approximately 4,203 residents, Middlefield offers a peaceful, rural atmosphere.
The town's population is composed of about 50.27% males and 49.73% females, and it has a population density of 330.94 people per square mile (127.78/km²). Middlefield lies at a latitude of 41.52 and a longitude of -72.71, operating in the UTC-5.
Locals reflect a blend of American ancestry, with roots primarily in United States (0%), followed by English (13.6%), German (13.5%), and Scotch-Irish (0%) heritage. The town is identified by the ZIP code 06455.