The Montesano Library was built in 1960 by the Abel family as a memorial to W. H. Abel. It served as a headquarters library for the Grays Harbor Rural Library District. With the vote to establish the Timberland Regional Library district in 1968, it became the property of TRL.

The Montesano Library has:

- Books, videotapes, DVDs, CDs, audio cassettes, newspapers and magazines for readers and library users of all ages.

- Programs for children and adults.

- Computers with access to the Internet, Microsoft Office, and online reference databases.