The Cotati Historical Society is an independent 501(c)(3) non-profit corporation, founded in 2007, with the mission to preserve Cotati history through the acquisition and preservation of artifacts, photos, archives, and other historical materials.
The Jesse Peter Museum houses collections of ethnographic art from throughout the Americas and parts of Africa, Asia, and the Pacific. Permanent exhibits include the following: Pomo Roundhouse Model and Basketry, Pomo Ceremonialism, Southern California, Navajo (Diné), Plains and Plateau, Southwest Jewelry, Klamath River Area House Model,Hopi Pueblo Model with Kachina Dolls, and Pueblo Pottery. There are also a number of rotating, temporary exhibits.
The Pacific Coast Air Museum, located near the Sonoma County Airport, was established to promote the acquisition, restoration, safe operation and display of historical aircraft, and also to promote local aviation history and foster interest in general aviation and aviation history.
The Petaluma Museum exhibits Petaluma poultry, dairy, and Miwok Indian history artifacts and records dating from the 1850s. Its research library collection includes books, early maps and files that can assist with historical, genealogical, and architectural research for Petaluma and the surrounding area.
Founded in 1985, the Sonoma County Museum provides cultural experiences for the enrichment, enjoyment and education of Sonoma County residents and visitors through the preservation of collections and the presentation of exhibitions and programs. It also hosts a History Outreach Program offering in-class presentations related to the history of Sonoma County.
The West County Museum is Sebastopol. Museum exhibits are changed 2 to 3 times a year and focus on west Sonoma County history. Past exhibits have explored movies filmed in Sonoma County, historical toys, eclectic collections from the community, the World War II experience on the home front, the apple industry and apple festivals and fairs, and early lighting devices.