Auburn is the county seat of Placer County, California. Its population at the 2010 census was 13,330. Auburn is known for its California Gold Rush history.

Auburn is part of the Greater Sacramento area.

Archaeological finds place the southwestern border for the prehistoric Martis people in the Auburn area. The indigenous Nisenan, an offshoot of the Maidu, were the first to establish a permanent settlement in the Auburn area.

In the spring of 1849, a group of French gold miners arrived and camped in what would later be known as the Auburn Ravine. This group was on its way to the gold fields in Coloma, California, and it included Francois Gendron, Philibert Courteau, and Claude Chana. The young Chana discovered gold on May 16, 1848. After finding the gold deposits in the soil, the trio decided to stay for more prospecting and mining.

Placer mining in the Auburn area was very good, with the camp first becoming known as the North Fork Dry Diggings. This name was changed to the Woods Dry Diggings, after John S. Wood settled down, built a cabin, and started to mine in the ravine. The area soon developed into a mining camp, and it was officially named Auburn in August 1849. By 1850, the town's population had grown to about 1500 people, and in 1851, Auburn was chosen as the seat of Placer County. Gold mining operations moved up the ravine to the site of present-day Auburn. In 1865, the Central Pacific Railroad, the western leg of the First Transcontinental Railroad, reached Auburn, as it was being built east from Sacramento toward Ogden, Utah.

California (pronounced ⁱ/kælɨˈfɔrnjə/) is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third most extensive (after Alaska and Texas). It is home to the nation's second- and sixth-largest census statistical areas (Los Angeles Metropolitan Area and San Francisco Bay Area), and eight of the nation's fifty most populated cities (Los Angeles, San Diego, San Jose, San Francisco, Fresno, Sacramento, Long Beach and Oakland). The capital city is Sacramento.

California's diverse geography ranges from the Pacific Coast in the west, to the Sierra Nevada mountains in the east – from the Redwood–Douglas-fir forests of the northwest, to the Mojave Desert areas in the southeast. The center of the state is dominated by Central Valley, a major agricultural area. California contains both the highest and lowest points in the contiguous United States (Mount Whitney and Death Valley), and has the third-longest coastline of all states (after Alaska and Florida). Earthquakes are a common occurrence due to the state's location along the Pacific Ring of Fire: about 37,000 are recorded annually.