Norfolk County is a county located in the eastern part of Massachusetts, USA. The county was created in 1793 and is named after the English county of Norfolk. The county seat is located in Dedham, which is also the largest town in the county. With a population of over 700,000 people, Norfolk County is the fifth-most populous county in Massachusetts. The county is known for its historical significance, as it played a major role in the American Revolution and is home to numerous historic sites and landmarks.