Sonoma County fared worse than most other areas of the state and nation during the depths of the recession in 2009, according to new data from U.S. economic analysts.
The county's $20 billion economy shrank 3.7 percent between 2008 and 2009, compared to 2.4 percent for all metropolitan areas.
That put Sonoma County among some of the hardest-hit regions in the country, including Flint, Mich., Youngstown, Ohio and California's Central Valley.
Some local economists said they were surprised by Wednesday's report from the U.S. Bureau of Economic Analysis.
"I can't believe we were worse than Riverside and San Bernardino," said Ben Stone, executive director of the Sonoma County Economic Development Board.
The county's job market held up better than other parts of California during that time, he said, with only 10 counties reporting lower unemployment rates.
But the new data show how some sectors of the economy, led by construction, dragged down Sonoma County's overall output.
"We lost 40 percent of the jobs in construction," Stone said.
The study examined gross domestic product, the value of goods and services produced by a particular region. It found 80 percent of 366 U.S. metropolitan areas suffered a decline in 2009.
But only 61 areas saw a deeper drop than Sonoma County, according to the report. After removing the impact of inflation, Sonoma County's gross domestic product fell from $20.4 billion to $19.6 billion in 2009.