Map of the four states proposed by Martin Hutchinson in 2009. Source: Hutchinson, Martin (2009-05-21). "Califournia Breakup?". Thomson Reuters. Archived from the original on 8 July 2011. Retrieved on 23 February 2011.  San Diego/Orange County/Inland Empire(listed as "five counties", so w:Inland Empire imputed to include Riverside, San Bernardino, and Imperial counties)
  Greater Los Angeles(three counties, explicitly listed as LA, Ventura, and Santa Barbara)
  San Francisco/Sacramento/Santa Cruz/Silicon Valley(thirteen counties, imputed to include the nine Bay Area counties, Sacramento, Santa Cruz, Yolo as part of Sacramento MSA, and Monterey, based on politics)
  Northern/Central Valley
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Mliu92