I think you&#x27;re right. My method for that was to punch into Google &#x27;San Francisco Bay Area population&#x27; and write down the number that came up. &#x27;San Francisco population&#x27; gives the same number, so I guess it was just the city.<p>It&#x27;s a good idea to try individual zip codes: It seems like you could get more accurate population data by trying all the possible zip codes and summing the associated census data.