From the Number Crunchers at the U.S. Department of Labor:

Large County Employment
In September 2007, national employment, as measured by the QCEW program, was 136.2 million, up by 0.9
percent from September 2006. The 328 U.S. counties with 75,000 or more employees accounted for 70.9 percent
of total U.S. employment and 76.7 percent of total wages. These 328 counties had a net job gain of 742,807 over
the year, accounting for 61.1 percent of the overall U.S. employment increase. Employment rose in 217 of the
large counties from September 2006 to September 2007. Orleans County, La., had the largest over-the-year
percentage increase in employment (8.6 percent). Fort Bend, Texas, had the next largest increase, 7.1 percent,
followed by the counties of Williamson, Tenn. (5.8 percent), Wake, N.C. (5.2 percent), and Utah, Utah (5.0
percent). The large employment gains in Orleans County reflected significant recovery from the substantial job
losses that occurred in 2005 and 2006, which were related to Hurricane Katrina. (See table 1.)