Hanson is a town located in Plymouth County, Massachusetts. It was first settled in 1632 and was officially incorporated in 1820.

According to the United States Census Bureau, the town has a total area of 40.6 km² (15.7 mi²). 38.9 km² (15.0 mi²) of it is land and 1.7 km² (0.7 mi²) of it is water. The total area is 4.21% water.