Welcome to the Commonwealth Catalog

The Commonwealth Catalog (ComCat) extends your search beyond your local library’s resources. In one easy step, you can search through millions of items at participating libraries across Massachusetts to find the books, DVDs, and music you’re looking for. Make a request and it will be delivered right to your local library for quick pickup.

  • Check availability of items in the MassCat Catalog before using the Commonwealth Catalog.
  • Items that are available in MassCat libraries may not be requested from the Commonwealth Catalog.
  • MassCat patrons with active library accounts may request materials from the Commonwealth Catalog.
  • You will be notified via email when an item is available for pickup, usually within 4 – 7 business days.
  • Items are loaned for 28 days and may not be renewed.
  • For more information, see the Commonwealth Catalog FAQ linked HERE.

Click on the following link to search or login:  > Commonwealth Catalog <


PARTICIPATING LIBRARIES
*Note School libraries only available Sept.- May.
Click for
Library's Homepage.
Click for
Library's ComCat site.
Archbishop Williams High School*BraintreeLibrary's HomepageLibrary's ComCat site
Bay Path Regional Vocational Tech. High School*, CharltonLibrary's HomepageLibrary's ComCat site
The Becket Athenaeum, BecketLibrary's HomepageLibrary's ComCat site
Gilbertville Public Library, HardwickLibrary's HomepageLibrary's ComCat site
Gloucester High School*, GloucesterLibrary's HomepageLibrary's ComCat site
Grace Hall Memorial Library, MontgomeryLibrary's HomepageLibrary's ComCat site
Hamilton Memorial Library, ChesterTown's HomepageLibrary's ComCat site
Huntington Public Library, HuntingtonLibrary's HomepageLibrary's ComCat site
McCann Technical School*, North AdamsLibrary's HomepageLibrary's ComCat site
MLS Professional Collection, Mass. Library System, MarlboroughLibrary's HomepageLibrary's ComCat site
Nahant Public Library, NahantLibrary's HomepageLibrary's ComCat site
Paige Memorial Library, HardwickLibrary's HomepageLibrary's ComCat site
The Pelham Library, PelhamLibrary's HomepageLibrary's ComCat site
Phinehas S. Newton Library, RoyalstonLibrary's HomepageLibrary's ComCat site
Rutland Free Public Library, RutlandLibrary's HomepageLibrary's ComCat site
Sandisfield Public Library, SandisfieldLibrary's HomepageLibrary's ComCat site
Upper Cape Cod Regional Technical School*, BourneLibrary's HomepageLibrary's ComCat site