St. George, Utah
2010 population: 138,115
2000 population: 90,35
Growth: 52.9%
St. George is found in the southwest corner of the state, a lot closer to Las Vegas than to Salt Lake City, and is closer in terms of climate as well, with hot summers and mild winters. The latter has made it a Mecca for retirees.
But thanks to the recession, fewer people are retiring, which has cut a bit into the area's growth. In 2009, the Census Bureau projected the population was 137,473, so the town just barely grew in the last year of the decade.
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Last updated March 28 2011: 4:19 PM ET
