Dedham /dɛdəm/ is a town in and the county seat of Norfolk County, Massachusetts, United States. The population was 24,729 at the 2010 census. It is located on Boston's southwest border. On the northwest it is bordered by Needham, on the southwest by Westwood and on the southeast by Canton.
Settled in 1635 by people from Roxbury and Watertown, Dedham was incorporated in 1636. It became the county seat of Norfolk County. When the Town was incorporated, the residents wanted to name it Contentment. The Massachusetts General Court overruled them and named the town after Dedham, Essex in England, where some of the original inhabitants were born.
At the first public meeting on August 15, 1636, eighteen men signed the town covenant. They swore that they would "in the fear and reverence of our Almighty God, mutually and severally promise amongst ourselves and each to profess and practice one truth according to that most perfect rule, the foundation whereof is ever lasting love."