The primary function of the CCHS/CCHM is to acquire, store, preserve, exhibit, publish and interpret documents and artifacts relating to the history of the people of Clark County and their significance to Pacific Northwest and U.S. history. CCHS is directly responsible for the operation, maintenance, staffing and improvements of the museum and its research library.
To achieve the above functions, the museum produces changing interpretive exhibits utilizing the tangible historic objects stored in the museum collection and supplemented with temporary loans of additional related items from the community and/or other heritage organizations. The museum also hosts traveling exhibits from larger institutions and regularly provides lectures, classes, special events, student internships, teacher training opportunities and other related education programs to further the appreciation of the history and culture of Clark County. The CCHS also publishes an annual publication entitled Clark County History.
The CCHM research library provides photo reproduction and research services.
The CCHM operates a museum store that features books and items related to museum programs.