Stay current with local workplace posting requirements with the 2026 San Mateo County Labor Law Poster from Best Labor Law Posters. The San Mateo County minimum wage is $17.95 per hour effective January 1, 2026, for covered employees working in the unincorporated areas of San Mateo County. The official County notice must be posted in a location where employees can easily read it. The requirement generally applies to employees who work at least two hours per week within the County's unincorporated areas, including full-time, part-time, temporary, seasonal, and other covered workers. This San Mateo County labor law poster helps businesses keep important local wage information visible and accessible while supporting their overall workplace posting compliance.