1865
- The The Daily Dramatic Chronicle (later logo pictured) is founded in San Francisco by teenage brothers Charles de Young and Michael H. de Young
- The California Pacific Rail Road Company is incorporated in San Francisco
- The California State Mineral Collection is begun in San Francisco, driven by the mineral finds of the California Gold Rush
- Jefferson Thompson in West Marin begins making a fresh Brie "breakfast cheese" that is transported by horse-drawn carriage to Petaluma, then shipped by steamboat down the Petaluma River to San Francisco where it is sold to waterfront dockworkers