Grafton is a town in Worcester County, Massachusetts, United States. The population was 19,664 at the 2020 census.[1] The town consists of the North Grafton, Grafton, and South Grafton geographic areas, each with a separate ZIP Code. Incorporated in 1735, the town is home to a Nipmuc village known as Hassanamisco Reservation, the Willard House and Clock Museum, Community Harvest Project, and the Tufts University Cummings School of Veterinary Medicine.

The town is named for Charles FitzRoy, 2nd Duke of Grafton, a title created for the illegitimate son of King Charles II of England. Ethan Allen ran a gun factory in Grafton in the early 19th century. In the 1930s, a movie, Ah, Wilderness!, was filmed in the town. The moviemakers built a bandstand on the town common, which has been torn down and rebuilt many times since, making it similar but different. Grafton Common has many historic homes, churches and buildings and is considered the most quintessential common in the Blackstone Valley.[citation needed] The town is part of the Blackstone River Valley National Heritage Corridor, the oldest industrialized region in the U.S.