California's executive mansion, popularly known as the Governor's Mansion, was built in 1877 for Albert and Clemenza Gallatin. Albert was a partner in the Sacramento hardware store of Huntington & Hopkins. The State of California purchased the house from Joseph and Louisa Steffens to use as a home for California's first families in 1903 for $32,500. Victorian architecture was somewhat out of style by then, but the house was suitably impressive, conveniently located, and comfortable. Today's guests see marble fireplaces from Italy, gold-framed mirrors from France, and exquisitely handcrafted hinges and doorknobs, all of which are reminders of the Gallatins and the Victorian era. Outside some of the Mansion's abundant vegetation includes flowers, shrubs, and trees dating back to 1877. When visitors look behind the grape-stake fence and see Governor Brown's swimming pool built in 1959, they are reminded that the Governor's Mansion State Historic Park is really a walk through time.

The park offers tours and occasional recreational and educational events.

The California State Military Museum is the official state military museum, under the U.S. Army. Today, the museum houses over 30,000 artifacts, a library with over 10,000 volumes, and archives. These collections include items of importance to state and national military history of all military branches, ranging in time from prior to the Spanish American War to World War II.

The museum offers exhibits, a research library, an image library with a number of online selections, and guided tours for school groups.

The La Mesa Historical Society seeks to preserve and share the history of La Mesa, California. This history encompasses time as grazing land for cattle and sheep in the late 1800s and as a silent movie production center in the early 1900s. The society is located within the 1908 Reverend Henry McKinney House, a turn of the century house museum. In addition to maintaining the Rev. Henry McKinney House and Museum, the Society is also home to the Palermo building. The Palermo building houses city directories and 1,500 photographs depicting early La Mesa.

The society hosts local third grade classes for McKinney House tours and educational programming on schooling and daily life in the early 1900s. Other opportunities include walking tours, annual historic home tours, photographic presentations, exhibits at special events, and quarterly history roundtables.

The Redondo Beach Historical Society seeks to preserve and build awareness of the history of Redondo Beach, California. The society operates a museum containing information, artifacts, and memorabilia. This museum is located in a Queen Anne cottage built circa the 1890's.

The society offers a museum with exhibits.

Pasadena Heritage seeks to preserve the history of Pasadena, California. The offices are located in the Madison House, an 1893 Victorian home.

The organization offers oral history transcriptions for viewing on site and for purchase, as well as special events, including educational programs, tours, lectures, and workshops.

The West Sacramento Historical Society seeks to preserve and share the history of West Sacramento and East Yolo County, California. The society operates a museum and several interpretive displays located throughout the area. Collection highlights include three fire engines—a 1926 Federal with Dodge Brothers engine, a 1937 Chevy wooden tanker, and a 1954 or '55 International engine.

The museum offers exhibits.

Housed in the old San Mateo County Courthouse, the Museum is preserves the history of the county and makes it accessible to the public. It hosts exhibits detailing the history and development of the county.

The museum offers exhibits, tours, research library access, educational programs, and recreational and educational events (including living history events).

The Ventura County Museum of History and Art works to preserve the history of Ventura County and showcase art of Ventura County and local art. The museum hosts collections of art, documents, photographs, and artifacts which represent a comprehensive record of life in Ventura County from prehistory to present.

The museum offers exhibits, special events, school outreach programs, guided tours, and field trip programs. The website offers visitor information, an events calendar, and information regarding field trip and school outreach programs.

The Western Neighborhoods Project seeks to preserve and share the history of San Francisco's western neighborhoods—including the Richmond and Sunset Districts.

The organization offers outreach slide shows and lectures. The website offers historic photographs.

The Pardee Home Museum is the centerpiece of Oakland's Preservation Park Historic District, and is a phenomenal piece of 19th century architecture. The home was built by California Governer Enoch Pardee who became famous for his handling of the enormous earthquake in 1906. The home was listed on the National Register of Historic Places in 1976, and today stands as a historic house museum.

The home offers tours and an educational curriculum for fourth through sixth graders. The curriculum corresponds to collections inside the home. The website offers visitor information and basic historical information regarding the home.