The U.S. Census Bureau has corrected its Bay Area population data because of a mistake involving Marin County’s numbers, according to a Federal Register notice published Tuesday.
The errors involved figures the bureau officially released in December, when it reported the population of the San Francisco-Oakland urban area as 3.2 million. The correction brings the figure to 3.5 million residents.
The addition of about a quarter-million residents, as well as more than 100,000 homes, came from the San Rafael-Novato urban area, which had been counted separately by accident when it should have been deleted and merged with the San Francisco-Oakland urban area.
Because of similar errors, the bureau also increased the populations of the Atlanta and New Orleans urban areas.
The agency publishes a list of urban areas and their population and housing counts after every once-a-decade census.