Hillsborough is an incorporated town in San Mateo County, California, in the San Francisco Bay Area. It is located 17 miles (27 km) south of San Francisco on the San Francisco Peninsula, bordered by Burlingame to the north, San Mateo to the east, Highlands-Baywood Park to the south, and Interstate 280 to the west.
With a 2020 population of 11,386, it is the 366th largest city
in California and the 2831st largest city in the United States.
Hillsborough is located on the Rancho San Mateo Mexican land grant which was purchased by William Davis Merry Howard, son of a wealthy Hillsborough, New Hampshire, shipping magnate, in 1846. Howard settled his family in this area, which attracted wealthy San Franciscans. In 1910, Hillsborough residents voted to incorporate from the town's foundation until 1963, it was an exclusive community for wealthy whites. That all changed in 1963 when Jack and Betty Ken, the first-generation children of Chinese Immigrants, purchased land in the town. This made them the first non-white people to own land in the town, which effectively desegregated Hillsborough.
Hillsborough has its own highly regarded and ranked public elementary and middle school system, but no public high school. High school-aged children can attend one of several schools in the San Mateo Union High School District, generally assigned by residential address. The town is also home to a small number of independent schools. The Hillsborough school district is ranked as the #1 school district in California and one of the top ten school districts in the country.