State and local tax revenues fell 7% in the third quarter of 2009 from a year ago, the Census Bureau said in a report underscoring how the economic downturn is stressing government collections.

Sales taxes declined 9% to $70 billion in the third quarter compared with the year-ago period, the Census Bureau said. Income taxes plunged 12% to about $58 billion. Together, sales and income taxes make up roughly half of state and local tax revenue.

"We...