About MLS

The Massachusetts Library System (MLS) provides services to about 1,600 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.

Our mission has always embraced social justice and the MLS Team is committed to providing services that benefit and contribute to the library profession’s core values: diversity, inclusion, equity, access to information, free expression, privacy, and social justice.

Contact Information:

Voice: 508-357-2121
Toll Free: 866-627-7228 (in Massachusetts only)
TTY (MassRelay): 800-439-2370 (in Massachusetts only)
Marlborough Fax: (508)-357-2122
Northampton Fax: (413) 586-0727
Email: info@masslibsystem.org

Office Street Addresses:

225 Cedar Hill Street, Suite 229
Marlborough, MA 01752

241-243 King Street, Suite 250
Northampton, MA 01060

Directions to our offices can be found here:


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