Centennial is a suburb of Denver with a population of 110,218. Centennial is in Arapahoe County and is one of the best places to live in Colorado. Living in Centennial offers residents a dense suburban feel and most residents own their homes. In Centennial there are a lot of restaurants, coffee shops, and parks. Many families and young professionals live in Centennial and residents tend to lean conservative. The public schools in Centennial are highly rated.