Lancaster is a town in Worcester County, Massachusetts, in the United States. Incorporated in 1653, Lancaster is the oldest town in Worcester County. For geographic and demographic information on the village of South Lancaster, please see the article South Lancaster, Massachusetts. Lancaster boasts being the official "mothertown" to all of central Massachusetts. Towns such as Harvard, Stow, Bolton, Hudson, Marlborough, Leominster, Clinton, Berlin and Boylston were all once considered part of Lancaster.