San Mateo County is one of California's distinct campaign markets, with a voter file, turnout pattern, and price point that don't transfer from one neighboring county to the next. This San Mateo County campaign guide covers filing deadlines with the county elections office, FPPC compliance expectations, realistic budget bands by race type, and the specific tactics that move votes in San Mateo County — direct mail saturation, slate placements, lawn-sign discipline, and door-to-door canvassing in the precincts that actually turn out.