“Venue rules designate a particular county (or counties) within California as the “proper” place for trial of the action. Since jurisdiction is statewide, the venue rules serve to narrow geographically the place for trial. Generally, venue rules are not jurisdictional. This means that if the action is filed in an “improper” court, and no objection is raised, that court can render an enforceable judgment.”
[California Practice Guide: Civil Procedure Before Trial [certain citations omitted]]
