Centennial is a city located in Arapahoe County, Colorado. Founded in 2001, no official census data is available on the city. According to the United States Census Bureau's 2002 estimate, the city has a total population of 99,447.

After hearing plans by neighboring Greenwood Village to incorporate parts of then-unincorporated Arapahoe County in order to increase revenue, citizens of the area feared that the increased taxes in the largely-commercial annexation would take revenue from the county, leaving residents without any benefits. Campaigning on a promise to keep city taxes at 1% (one of the campaigns against incorporation appealed to maintain the unincorporated 3.8% sales tax), Centennial was incorporated by vote on September 20, 2000 (77% in favor), and became the largest city incorporation in United States history.

Geography

Centennial is located at ¹.

According to the compiled census data, the city has a total area of 72.3 km² (27.9 mi²).

Demographics

Based on data from the census of 2000, there are approximately 103,000 people and 36,200 households. The city is approximately 87.4% White, 4.8% Hispanic or Latino, 3.6% Asian, 2.4% African American, 0.4% Native American, and 1/4% from other races.

The median age is 37.2 years, in comparison to the 35.3 year national average. For every 100 females there are 98.0 males.