The Federal Correctional Institution, Danbury is a low-security United States federal prison for male and female inmates in Danbury, Connecticut. It is operated by the Federal Bureau of Prisons, a division of the United States Department of Justice. The facility also has an adjacent satellite prison camp that houses minimum-security female offenders.

Danbury is a city in Fairfield County, Connecticut, located approximately 50 miles (80 km) northeast of New York City. Danbury's population as of 2020 was 86,518. It is the third-largest city in Western Connecticut, and the seventh-largest city in Connecticut.