is ranked among the top 50 safest cities in the nation by 24/7 Wall Street, and is considered one of the most sought-after zip codes in the U.S. The Centennial airport is the third busiest airport in the state and is the closest non-commercial airport to downtown Denver, which is a 20-minute drive to the north off I-25. Working in the Denver tech center(DTC)? Many DTC workers choose to live in Centennial due to its short commute and also provides many outdoor activities such as golf, walking and biking trails, and many parks. Centennial is Colorado’s newest city, formed in 2007. The citizens of the area had voted to incorporate on September 12, 2000, choosing Centennial as the official name during the vote. The name reflects Colorado's admission to the Union as the 38th state in 1876.