The boom areas of America

10 fastest-growing U.S. counties

According to the Census Bureau, these counties are adding more residents than any other.

Tarrant County, Texas
Tarrant County, Texas
Population: 1,671,295

Increase (July 2005 - July 2006): 51,629

The county seat, Fort Worth, has risen from its roots as one of America's foremost "cow towns" to become one of the 20 largest cities in the United States.

Tarrant County's economy, still strong in agriculture and cattle, is much more diversified today, with aerospace and defense contractors playing a major role.

Major employers include AMR Corp. (American Airlines), D.R. Horton Homes and Radio Shack.

Maricopa County, Arizona

Harris County, Texas

Riverside County, California

Clark County, Nevada

Tarrant County, Texas

Bexar County, Texas

Collin County, Texas

Dallas County, Texas

Wake County, North Carolina

San Bernardino County, California
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