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.

Harris County, Texas
Harris County, Texas
Population: 3,886,207

Increase (July 2005 - July 2006): 123,363

Houston's economy, closely tied to the oil industry, is enjoying another boom, and much of the county's population increase is occurring in the city's outlying suburbs.

The city itself has gained only about 60,000 since 2000, while the county population has soared by nearly half a million.

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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