Whitinsville is an unincorporated village within the town of Northbridge in Worcester County, Massachusetts, United States. Whitinsville is a census-designated place (CDP) and its population was 6,750 at the 2020 census. Whitinsville is pronounced as if it were spelled "White-ins-ville". It was founded by the Whitin family, after whom it is also named. It is a post office jurisdiction, with a ZIP Code of 01588. It is located on the Mumford River, a tributary of the Blackstone River.

Northbridge is a town in Worcester County, Massachusetts, United States. The population was 16,335 at the 2020 census. The Northbridge Town Hall is located at 7 Main Street in Whitinsville. The town is now a part of the Blackstone River Valley National Heritage Corridor, of the National Park Service. Northbridge claims to history include: Native American Nipmuc lands, Colonel John Spring, who led the Uxbridge militia training company in the American Revolution, Samuel Spring, Revolutionary War Chaplain, the Residence of Ezra T. Benson 1830–1832, the birthplace of President Millard Fillmore's mother, Phoebe, and home to the Whitin Machine Works from 1831 to 1964.