SixMillionDollarFlan t1_ithm0ca wrote

It's an interesting question. I think it's used as a geographic region (literally), and a sociological grouping. Literally, Sac might be part of the central valley region. But since it's a business/financial center instead of an agricultural town it's different culturally.

It reminds me of the East Coast where Appalachia refers to a type of living (rural) as well as a geographic region that has larger urban areas.

But Cali has never been good at naming regions (see NorCal/SoCal divide).