Westwood is a town in Norfolk County, Massachusetts, United States. The population was 14,618 at the 2010 census. In July 2005, CNN/Money and Money magazine ranked Westwood 13th on its list of the 100 Best Places to Live in the United States. Boston Magazine included Gay Street in Westwood on its list of the Best Streets in the Boston area. It is currently the 16th wealthiest town in Massachusetts. Westwood was first settled in 1641 and was part of the town of Dedham (it was originally called 'West Dedham') until it was officially incorporated in 1897. It was the last town to split from the original town of Dedham.