The North Bay leads the Bay Area in numbers of residents aged 60 or older.
Marin County, registering 27.2 percent of residents over 60, Sonoma with 24.1 percent and Napa with 23.4 percent are above the national average of 20.4 percent older residents. On the low end is Santa Clara County, the center of entrepreneurial and tech-centric Silicon Valley.
#4. San Mateo
#5. San Francisco
#6. Contra Costa
#9. Santa Clara
The 27.2 percent of older residents in Marin County is higher than that in the entire state of Florida, a retirement haven, which measures 25.2 percent. On the other end of the table, Alameda County’s low rate of 18 percent is affected by the number of residents over 60 in the city of Oakland, which is just 17.7 percent.
Source: US Census Bureau ACS table S0101