Located outside city boundaries, the library is operated by the 501(c)(3) non-profit Cedar Mill Community Library Association. The library is one of the largest nonprofit association libraries in the United States with a collection of 250,000 items and more than 2.5 million loans annually. The Association operates a Main library in Cedar Mill and a branch in the Bethany Village Shopping Center. The libraries are members of WCCLS, the Washington County Cooperative Library Service which provides operational funding, shared computer, circulation and courier services and a common card that offers free access to the more than 1.6 million items found in Washington County public libraries.
The Cedar Mill Community Library Association is a 501(c)(3), nonprofit organization dedicated to providing public library service in Cedar Mill and Bethany communities in unincorporated Washington County, Oregon.