Bolton is a town in Worcester County, Massachusetts, United States. Bolton is in central Massachusetts, located 25 miles west-northwest of downtown Boston along Interstate 495. It is within Greater Boston and MetroWest regions. The population was 5,665 at the 2020 census. Settled in the 1600s and incorporated in 1738, the town is still home to many farms and apple orchards as well the well-known Nashoba Valley Winery and The International Golf Club, which has hosted several major tournaments.