City in California
Today, more than 764,000 people call San Mateo County home and it stretches the boundary of Silicon Valley northward. … Within its 455 square miles bordered by the Pacific Ocean to the west and San Francisco Bay to the east, the County is known for its mild climate and scenic vistas.
San Mateo is very safe by Bay Area standards, even the less nice parts are more working-class than dangerous. San Mateo has a lower crime rate than Walnut Creek despite being more densely populated than Oakland. Generally, west of El Camino is the best.