Per US Department of Labor - Bureau of labor statistics
see : http://www.bls.gov
as of Oct 2007 : Raw data, not seasonally adjusted.
Out of total US population of 232,715,000
of which 153,516,000 are in labor force (= working & looking for work)
of which 146,743,000 are actually working.
My guess is that these numbers do not include illegal alien workers, or
workers that work as independent contractors.
According to the US BoLS site, in 2008, 120,589,850 are employed out of an estimated 330,000,000 citizens. Statistics for 2009 are not yet complete. However, unemployment increased from 4.2%, in '07' to 9.8% as of sept, 2009.
at 10:29 AM on Mar. 28, 2010