Millbrae is a city in San Mateo County, California, the US. It officially became a city on January 14, 1948. It covers an area of 8.4 square kilometers and has a population of around 21,532. Millbrae has some of the best schools in the San Francisco Bay Area, which has resulted in a large concentration of high-class residential homes. On 2014 June 23rd, 11 district heads from Wuhan signed the Memorandum of Friendly Cooperation with 11 mayors from cities in the Silicon Valley area of USA.