The City of Centennial is a Home Rule City located in Arapahoe County, Colorado, United States and part of the Denver-Aurora metropolitan area. The city was estimated to have a total population of 100,557 in 2009. Centennial is the tenth-most populous municipality in the State of Colorado and its 2001 incorporation was the largest in U.S. history. Centennial is ranked as the 15th safest city in the country.

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