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Youngest Population: College Station, Tex.

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Going to Extremes Oldest Population: Largo, Fla. Youngest Population: College Station, Tex. Poorest: Escobares, Tex. Richest: Brookville Village, N.Y. Least Educated: East Los Angeles, Calif. Most Educated: Newton, Mass. Worst Employment Market: Imperial County, Calif. Best Employment Market: Williams County, N.D. Fattest: Fayetteville, N.C. Fittest: Santa Fe, N.M. Most Men: Redstone Arsenal, Ala. Most Women: Bryn Mawr, Pa. Most Kids: Kiryas Joel, N.Y. Least Kids: West Hollywood, Calif. Most Singles: Isla Vista, Calif. Most Divorces: Denison, Tex. Most Married: Sammamish, Wash. Most Immigrants:* Hialeah, Fla. Longest Commute: Port Sulphur, La. Coldest: Fairbanks, Alaska Hottest: Lake Havasu City, Ariz. Cheapest: Harlingen, Tex. Most Expensive: Manhattan Most Renters: Union City, N.J. Most Homeowners: Flower Mound, Tex. Most Populated: Manhattan Least Populated: Yukon-Koyukuk census area, Alaska Highest: Winter Park, Colo. Lowest: Calipatria, Calif. Most Dangerous:* W. Lake St. area, Chicago, Ill. Most Car Thefts: Las Vegas Safest: Pikesville, Md. Most Republican: Ochiltree County, Tex. Most Democratic: District of Columbia Most Consumer Debt: Seattle Most Frugal: Atlanta

Youngest Population: College Station, Tex.

Median age: 22.1 years
Total population: 86,676
U.S. median age: 36.8 years

The 39,000 undergraduates and 9,400 graduate students at Texas A&M University make the aptly named city of College Station the youngest in the country. More than half the population is between the ages of 15 and 24, according to 2009 estimates by the U.S. Census Bureau.

Data source: U.S. Census Bureau's American Community Survey 2009. Only includes places with populations of 65,000 or more.