Cromwell is a town in Middlesex County, Connecticut, United States located in the middle of the state. The population was 14,005 at the 2010 census.
The town was named after a shipping boat that traveled along the Connecticut River, which runs along Cromwell. The ship was named after Oliver Cromwell, Lord Protector of the Commonwealth of England. Other theories are that the town was named after the 1776 warship Oliver Cromwell, or named directly after the Lord Protector Cromwell.
The Roman Catholic Padre Pio Foundation of America is located in Cromwell.
The Evangelical Covenant Church's regional East Coast Conference offices are located in Cromwell.