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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.#1. Marin – 27.2 percent of residents over 60#2. Sonoma – 24.1 percent of residents over 60#3. Napa – 23.4 percent of residents over 60#4. San Mateo – 20.7 percent of residents over 60#5. San Francisco – 20.3 percent of residents over 60#6. Contra Costa – 20.2 percent of residents over 60#7. Solano – 19.9 percent of residents over 60#8. Alameda – 18.0 percent of residents over 60#9. Santa Clara – 17.3 percent of residents over 60[bar color=”Accent-Color” title=”#1. Marin” percent=”27.2″][bar color=”Extra-Color-1″ title=”#2. Sonoma” percent=”24.1″][bar color=”Accent-Color” title=”#3. Napa” percent=”23.4″][bar color=”Extra-Color-1″ title=”#4. San Mateo” percent=”20.7″][bar color=”Accent-Color” title=”#5. San Francisco” percent=”20.3″][bar color=”Extra-Color-1″ title=”#6. Contra Costa” percent=”20.2″][bar color=”Accent-Color” title=”#7. Solano” percent=”19.9″][bar color=”Extra-Color-1″ title=”#8. Alameda” percent=”18.0″][bar color=”Accent-Color” title=”#9. Santa Clara” percent=”17.3″]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

Daniel J. Willis