The American Woolen Mill, is a historic building located on Main Street in Vassalboro, Maine. Built around 1850, it expanded during key war years—1850, 1917, and 1943—and once held the title of the largest mill in New England. The mill was renowned for its award-winning cashmere and employed over 500 workers at the height of its production. It even housed a steam engine to power its equipment, with a similar model now displayed at the Owls Head Transportation Museum.

Although the mill ceased operations in 1955, displacing 400 employees, it continued to serve as a business incubator and community resource. Over the years, more than 15 companies, including the Ladd Paper Company, Kennebec Bean Company, Midstate Machine, and Duratherm Windows, began operations there. Some well-known businesses like Marden’s and John Julia also called the Olde Mill home before moving into their own facilities.

Today, now known as the Olde Mill, remains a beloved landmark and gathering place for the town. It hosts a variety of events such as weddings, birthday parties, flea markets, and craft fairs. Local resident Ray Breton expresses a deep affection for the mill, emphasizing its ongoing role in bringing people together and creating joyful memories. With its rich history and continued community significance, the Olde Mill stands as both a historical treasure and a vibrant social hub.