Northern California is not a formal geographic designation. Historically, the state was divided by the Tehachapi Mountains which was a barrier to travelers before highways were built, and remains a bioregion barrier. … See more

Prehistory to 1847
Inhabited for millennia by Native Americans, from the Shasta tribe in the north, to the Miwoks in the central coast and Sierra Nevada, … See more

Northern California has a warm or mild to cool climate, in which the Sierra mountains gets snow in the late fall through winter and occasionally into spring. Summers are mild along the coast … See more

Since the events of the California Gold Rush, Northern California has been a leader on the world's economic, scientific, and cultural stages. … See more

Northern California's largest metropolitan area is the San Francisco Bay Area which consists of 9 counties: Alameda, Contra Costa, Marin, Napa, … See more

Northern California's economy is noted for being the de facto world leader in high-tech industry (software, semiconductor/micro-electronics, biotechnology and medical devices/instruments), … See more

The population of the forty-eight counties of northern California has shown a steady increase over the years.
The largest percentage increase outside the Gold Rush era … See more