District One includes the cities of Burlingame, Hillsborough, Millbrae, San Bruno (everything east of Interstate 280 and areas west of 280 and south of Sneath Lane) and South San Francisco (east of Junipero Serra Boulevard and south of Hickey and Hillside Boulevards). Unincorporated Burlingame Hills, San Mateo Highlands and Baywood and San Francisco International Airport