The unemployment rate was below 4 percent in October in eight of the nine San Francisco Bay Area counties, officials with the California Employment Development Department said.
San Mateo County had the lowest rate at 2.5 percent followed by Marin County at 2.6 percent and San Francisco County at 2.7 percent.
The rates were between 3 and 3.5 percent in Santa Clara, Sonoma, Napa, Alameda and Contra Costa counties.
Solano County had the highest unemployment rate in the Bay Area at 4.3 percent.
The unemployment rate was 4.9 percent statewide compared with 4.1 percent nationwide in October.