The Lancasters Mills are a 19th-century complex of predominantly brick mill buildings at the corner of Green and Chestnut Streets, near the center of Clinton, Massachusetts. Founded in 1844 by a group led by Erastus and Horatio Bigelow, the Lancaster Mills were the first major mill to produce gingham fabrics. Its success in the 1840s led to the establishment of the town of Clinton out of Lancaster. The 29-acre (12 ha) complex was expanded regularly throughout the 19th century and was used for textile manufacturing into the 20th century.