The Jefferson Union High School District is a high school district in northern San Mateo County, California, which serves the cities of Daly City, Brisbane and Pacifica, the town of Colma, the CDP of

San Mateo County, officially the County of San Mateo, is a county located in the U.S. state of California. As of the 2020 United States census, the population was 764,442. Redwood City is the county s