The Society is dedicated to the collection, preservation, and interpretation of the cultural history of Clark County and the Pacific Northwest, and to sponsoring educational programs and exhibits for the enrichment of all members of the public.

Additional funding helps sustain the operation of the museum and comes in many forms including: Clark County Historical Society membership dues, private and foundation grants, corporate sponsorships, in-kind gifts, and donations.

Since 2004, the museum has hosted Harvest Fun Day, an annual community event featuring scarecrow making, pumpkin painting, pie-eating, and corn-shucking contests, as well as antique farm equipment demonstrations and live music.

Rotating guest lecturers speak at 7 p.m. on a variety of pertinent topics.

In 2010, the museum became the home of The Brautigan Library, a permanent collection of unpublished manuscripts inspired by author and poet Richard Brautigan's 1971 book The Abortion: An Historical Romance 1966 and submitted by people from around the world in the early 1990s.