Centennial was first counted by the census in 1980
Among the newest of U.S. towns · #155 of 159 in Colorado. What drives it
Most of Centennial was built recently: 0.5% of its homes predate 1940 and the median home dates from 1983. Below: maps from 1949 on and the census since 1980.
On its age, its old homes and the National Register, Centennial is among the newest of U.S. towns, #155 of 159 in Colorado. Its National Register listings hold the grade up; its age pulls it down.
D−
HistoryA character grade: shown, never part of Centennial’s overall grade.
Among the 400 U.S. cities of 100,000 or more, Centennial ranks #397 on History.
Few Colorado towns list much on the Register (a typical Colorado town has 1.1 per 10,000 residents, the U.S. 2.4), so Centennial’s 0.0 sits below most of its state (22% of Colorado towns have fewer) while its 0 listings outnumber those of 23% of U.S. towns.
Newer cities are common at Centennial’s size: in the typical U.S. city of 100,000 or more, 5% of homes predate 1940.
How sure. Graded on any two of the three inputs instead, the letter would range from D− to D. The pre-1940 share (±0.4 points) is firm at this size.
Founding year: the first census (other dates in Quick answers). Homes: Census ACS 2020–24. National Register: National Park Service, May 2026 list; each listing counted once (boundary changes and added documentation belong to their listing), and a historic district counts its contributing buildings. How TownRatings grades history →
What stands out about Centennial’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
The City of Centennial was incorporated on February 7, 2001, from portions of unincorporated Arapahoe County, including the former Castlewood and Southglenn census-designated places (CDPs). 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, the centennial year of the United States Declaration of Independence. The state of Colorado is nicknamed the "Centennial State".
The Centennial post office opened in 1980, the earliest record of the town by name (U.S. post office records). Wikidata gives 2001.
How does Centennial rank for history?
Centennial is among the newest of U.S. towns, #155 of 159 in Colorado. The History grade combines the town’s founding era, the share of homes built before 1940 and its National Register listings. It’s a character grade, so it isn’t part of the overall grade. How it works.
How old are the homes in Centennial?
0.5% of Centennial’s homes were built before 1940 (Census estimate), against a typical 2.5% for a Colorado town; the median home was built in 1983.
Founding dates: Wikidata, Wikipedia, the U.S. post office records of Blevins & Helbock (CC0) and the Census. Homes by year built: Census ACS 2020–24. National Register of Historic Places: National Park Service (list of May 22, 2026). Old photos, postcards and papers: Wikimedia Commons, the Library of Congress and other public archives, credited on each item’s page. Maps: U.S. Geological Survey historical topographic maps (via Esri) and Sanborn fire-insurance maps (Library of Congress). History text and census tables: Wikipedia (CC BY-SA 4.0). Places that used to be: USGS Geographic Names Information System (2021).
From Wikimedia Commons (24), Wikipedia, Wikidata and Wikipedia for famous people, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia) and the USGS Geographic Names Information System. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.