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.

Dallas County, Texas
Dallas County, Texas
Population: 2,345,815

Increase (July 2005 - July 2006): 37,288

Dallas is a business-friendly city that has become a center for the petroleum industry, telecommunications and banking. Because of its importance in the computer industry, the area is sometimes referred to as Silicon Prairie.

It's also a transportation center; the city of Dallas expanded around a nexus of 19th-century rail lines. Today, a network of interstate highways funnels shipping from southern Texas and Mexico through the county and north into America's heartland.

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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