3 ms·That's like saying Half Moon Bay is in the Bay Area because it's in San Mateo county.by dehrmann 3y agoThat's like saying Half Moon Bay is in the Bay Area because it's in San Mateo county.jjulius 3y agoI mean, I'd consider Half Moon Bay as part of the Bay Area, sure.alephnerd 3y agoHalf Moon Bay is the Bay Area though. Plenty of people live in HMB and commute to San Mateo, Belmont, Palo Alto, etc to work.