heres the bisness off the offical sons of anarchy website where the story takes place:

CHARMING, CALIFORNIA

Charming is a city located in San Joaquin County, California. The population is currently 14, 679.
Geography
Charming is 22.8 sq. mi. It's located in the upper part of the metro triangle, which is bounded by the Bay Area, Stockton and Sacramento. It is fifty miles from both Oakland and San Jose, and a bout thirty miles from both Stockton and Lodi.

Some fun facts for your ass bitches

this show aint based in oakland... i watch it and tha only shit in oakland its based on is sum nigga dat buys guns from them its really based by stockton

Charming is a fake city but if it were real it would be closest to Dublin, pleasanton or even Hayward (even though hayward is too close to oakland) But somewhere around there. It could even be around the valley, but that is farther than 50 miles from san jose, so i think Dublin/livermore is more correct.

Based on the first episode i thought the show was going to be based more in oakland than it actually is. They talked about oakland a bunch and blew that shit up in san leandro.

lets get this str8 this show is not in the bay area period yeah the mayans are bay area based so are everyone that he sells the guns 2 i got tha shit on on demand n shit and the 1st episode the sheriff car said san joaquin county sheriff thats stockton and surroundin areas

Its based in california. that should be enough

thats because in the first episode...their gunz warehouse was in lodi, ca...san joaquin county