About MLS

The Massachusetts Library System (MLS) provides services to more than 1,700 Massachusetts libraries of all types and sizes throughout the Commonwealth.  MLS was established in July 2010 with the following mission:

The Massachusetts Library System, a state-supported collaborative, fosters cooperation, communication, innovation, and sharing among member libraries of all types. The MLS promotes equitable access to excellent library services and resources for all who live, work, or study in Massachusetts.

Contact Information:

Voice: 508-357-2121
Toll Free: 866-627-7228 (in Massachusetts only)
TTY (MassRelay): 800-439-2370 (in Massachusetts only)
FAX: 508-357-2122
Email: info@masslibsystem.org

MLS has two offices:

225 Cedar Hill Street, Suite 229
Marlborough, MA 01752
Fax: (508)-357-2122

4 Sandy Lane
Whately, MA 01093
Fax: (413) 665-8877
Mailing address: PO Box 609
South Deerfield, MA 01373-0609