Smaller cities in the East Bay and South Bay saw larger rates of population growth in the 2010s, while unincorporated areas in the North Bay and South Bay lost residents.

Percent change in number of residents, by city and unincorporated areas, 2010 to 2020
Census Tracts   Cities, Towns, & Unincorporated Areas

Areas labeled with the name of the county ("Alameda County," for example) display the change in population for the sum total of unincorporated areas within that county.
Source: Bay Area Equity Analysis of CA Department of Finance and US Census data, via CA Dept. of Finance.Get the dataCreated with Datawrapper