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Marin census data error prompts Bay Area population revision

Marin census data error prompts Bay Area population revision

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.