The state's most populous city, and capital, is Denver. The Denver-Aurora-Boulder Combined Statistical Area, home to 2,927,911 people, contains more than two-thirds of the state's population. Residents of Colorado are properly referred to as Coloradans, although the term Coloradoans is still used.As of 2005, Colorado has an estimated population of 4,665,177, which is an increase of 63,356, or 1.4%, from the prior year and an increase of 363,162, or 8.4%, since the year 2000. This includes a natural increase since the last census of 205,321 people (that is 353,091 births minus 147,770 deaths) and an increase due to net migration of 159,957 people into the state. Immigration from outside the United States resulted in a net increase of 112,217 people, and migration within the country produced a net increase of 47,740 people.
The largest increases are expected in the Front Range Urban Corridor, especially in the Denver metropolitan area. The state's fastest growing counties are Douglas and Weld. Large numbers of new residents in the state originate from California, which led some locals to feel that their state was "Californicated" in the 1990s (esp. Denver resembled more of Los Angeles) when lower cost of living and a healthier economy drew in over 100,000 Californians at the time. The center of population of Colorado is located just north of the town of Critchell in Jefferson County.
Colorado has a high proportion of Hispanic citizens and Denver and some other areas have significant Mexican populations, while southern Colorado has a large number of Hispanos, the descendants of early New Mexican settlers of colonial Spanish origin. The 2000 U.S. Census reports that 10.52% of people aged 5 and over in Colorado speak Spanish at home. Colorado, like New Mexico, is very rich in archaic Spanish idioms.
Colorado also has some African-Americans communities which are located in northeast Denver in the Montbello, Green Valley Ranch, Park Hill and Colfax Park areas. The state has sizable numbers of Asian-Americans of Chinese, Filipino, Korean, Southeast Asian and Japanese descent. The Denver metropolitan area is considered more liberal and diverse than much of the state when it comes to political issues and environmental concerns.
According to the 2000 Census, the largest ancestry groups in Colorado are German (22%) including of Swiss and Austrian nationalities, Irish (12.2%), and English (12%). Persons reporting German ancestry are the largest group in the state and are especially strong in the Front Range, the Rockies (west-central counties) and Eastern parts/High Plains. Denver and nearby areas on the Front Range has sizable German, Scandinavian, Italian, Slavic and Jewish American communities, partly a legacy of gold rushes in the late 19th century (1861-1889).
There were a total of 70,331 births in Colorado in 2006. (Birth Rate of 14.6). In 2007, Non-Hispanic Whites constituted 73.5% of the population and accounted for 59.1% of all the births. The first time in state history with the statistic of non-Hispanic whites have fewer babies. But 14.06% of the births happened to parents of different races (About two-thirds to White-Latino parents). Westernmost counties where the majority of residents are adherents of Mormonism there's a slightly higher percentage of families with children and those of under age 18.
Colorado has a higher number of younger persons in median age: 33, according to the 2000 Census report. Large numbers of married couples in professional careers with young children move to the state in a belief it's a better place to raise a family. Colorado is also a major retirement destination by senior citizens in search of a cooler climate, recreation activities and the higher altitude in most of Colorado is said to provide health benefits for those with respiratory diseases.
