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.

Riverside County, California
Riverside County, California
Population: 2,026,803

Increase (July 2005 - July 2006): 81,411

Riverside County runs from Orange County all the way to the Arizona border. It encompasses huge amounts of Mojave Desert, with occasional oases, mountains and cities for variety.

The county's rapid growth can be traced to its proximity to Los Angeles; many of the new residents are Angelenos searching for less expensive homes.

There are also numerous recreational and retirement communities here, including the longtime playground for Hollywood stars, Palm Springs.

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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