Dedham 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.
Dedham is home to the Fairbanks House, the oldest surviving timber-frame house in the United States, scientifically dated to 1637. On January 1, 1643, by unanimous vote, Dedham authorized the first taxpayer-funded public school, "the seed of American education." Its first teacher, Rev. Ralph Wheelock, was paid 20 pounds annually to instruct the youth of the community. Descendants of these students would become presidents of Dartmouth College, Yale University and Harvard University.
The town's seal has several features. In the center is a crest containing the Old Avery Oak. When the tree was finally felled the gavel used by the Moderator at Town Meeting was carved out of it. Above the tree are the scales of justice, representing Dedham as the county seat and home to Norfolk County's courts. On the left of the tree are agricultural instruments and on the right is a factory, showing Dedham's history first as a town of farmers and then a one with a number of mills and factories, particularly along Mother Brook. Below the tree is a banner with the word "Contentment."