It's not Tequila unless it's made in Tequila, Mexico. And I'm not so much the California booster to suggest that anything we make here can compete with the real thing. That said, we Californians have fermented the same ingredients that the Mexicans use to create beverages that are not Tequila, but that still are pretty delicious.
Venus Spirits: Santa Cruz-based VS imports organic agave from the Jalisco highlands, and distills it into award-winning agave spirits.
Channel Islands Distillery: Ventura-based CID makes small-batch tequila.
Greenbar Distillery: Los Angeles-based Greenbar Distillery's organic IXÁ Tequila really is tequila, as in, they make it in Tequila, Mexico. It is the only one of their spirits that they don't make in their downtown-L.A. distillery.
Saint James Spirits: Irwindale-based SJS makes a 100% Blue Agave, distilled in California, and aged in French Oak.