Doctor density varies by specialty and location. Colorado has 122 practicing allergists & immunologists. Broken out by city, allergy & immunology doctor density in Arvada is 3, in Aurora is 7, in Boulder is 5, in Broomfield is 4, in Brush is 1, in Burlington is 1, in Castle Rock is 1, in Centennial is 12, in Colorado Springs is 14, in Denver is 42, in Durango is 1, in Englewood is 3, in Estes Park is 1, in Fort Collins is 11, in Fort Morgan is 1, in Grand Junction is 1, in Greeley is 5, in Greenwood Village is 1, in Highlands Ranch is 8, in La Junta is 1, in Lafayette is 2, in Lakewood is 13, in Littleton is 3, in Lone Tree is 2, in Longmont is 3, in Louisville is 1, in Loveland is 5, in Montrose is 1, in Pueblo is 5, in Steamboat Spr is 1, in Sterling is 2, in Thornton is 2, in U S A F Academy is 1, and in Wheat Ridge is 1.

Colorado is the Centennial state; having won statehood in 1876. Its capital is Denver, called the “Mile High City,” because its altitude at the state capitol steps is 5,280 feet. Colorado’s population is 4,653,023, and over half the state’s population is in the Denver metro area. Known for its Rocky Mountains and abundant outdoor sports opportunities, such as skiing, hiking, fishing and hunting, Colorado also offers tourists Pike’s Peak, the Royal Gorge, and the Red Rocks outdoor amphitheater. Denver is home to an active theater culture, a world-class symphony, and many sports activities. You can visit a gold mine, tour the state capitol building, climb a mountain, or relax in some therapeutic natural hot springs.

According to 2005 Census estimates, Colorado has a population of 4,665,177. Of this population, 1,140,002 are under the age of 18 and 462,190 are at or above the age of 65.