CW MARS At a glance

149 Libraries

with 176 branch locations spread across Central and Western Massachusetts

1M Patrons

registered in our shared system

8.1M Items

waiting to be enjoyed in our shared catalog

12M loans

borrowed in FY19, including 11 million physical items & 1.1 million e-items


Use your local CW MARS library card to:

A CW MARS library card gives access to:

AND, if a CW MARS library doesn’t have what you’re looking for, you can get it from another library from across the state.

One Card, Many Libraries

What do you love about your CW MARS Network? As part of the One Card, Many Libraries campaign, CW MARS libraries would also like to hear from residents about what’s important to them.

Residents can share their comments at: https://cwmars.lovemasslibraries.com/


Manually Renewing Items? So 2018.

Library patrons no longer have to remember to log into their account to renew the items they have checked out.

If an item has a renewal available, it will automatically renew on the due date.

An email notification will be sent on the due date alerting you that a renewal has been attempted for your items. Check the body of the email to find out whether your items were successfully renewed or if they were unable to be renewed.

Items will not renew under the following circumstances:

  • if the maximum number of renewals has already been reached
  • if you have fines/bills totaling more than $10 on your account
  • if your account has expired

All CW MARS member libraries are participating in auto-renewal. This means that no matter which CW MARS library your materials are from, they will automatically renew on the due date if a renewal is available.



check us out on mobile!

The CW MARS Libraries app is available on iOS and Android. With the app, you can...

  • Search the catalog and place holds.
  • Manage existing holds.
  • View items checked out.
  • Pay fines and fees.
  • View and update lists.
  • Display and use your digital library card (where accepted).
CW MARS Libraries App - Google
CW MARS Libraries App - Google
CW MARS Libraries App - iOS
CW MARS Libraries App - iOS


Need a library card?

Visit your local CW MARS member Library.

Looking for your next read?

Check out our search and explore options.

Going on Vacation?

Download e-content through OverDrive and Libby

Need Help?

Take a look at our FAQs and Help Guides.