More historic than 8% of U.S. towns · #125 of 159 in Colorado. What drives it
Most of Twin Lakes was built recently: 0.8% of its homes predate 1940 and the median home dates from 1977. Below: 3 old photos and papers, maps from 1941 on, and the census since 2000.
On its age, its old homes and the National Register, Twin Lakes is more historic than 8% of U.S. towns, #125 of 159 in Colorado. Its National Register listings hold the grade up; its share of homes from before 1940 pulls it down.
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HistoryA character grade: shown, never part of Twin Lakes’ overall grade.
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 Twin Lakes’ 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.
How sure. Graded on two of the three inputs, so a change in either one moves the letter more than it would with three. The pre-1940 share (±0.8 points) is firm at this size.
Founding year: our sources. 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 Twin Lakes’ past
Read from the archive, the National Register and the record. The page puts what stands out first.
Wikipedia doesn’t have a history of Twin Lakes yet. The photos, dates and memories neighbors add here are how it gets written.
Twin Lakes is a census-designated place (CDP) in and governed by Adams County, Colorado, United States]. The CDP is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area. The population of the Twin Lakes CDP was 8,226 at the United States Census 2020. Denver post office 80221 serves the area.
Between the 2010 and 2020 censuses its population grew from 6,101 to 8,226 (+35%).
Intro from Wikipedia. Population: U.S. Census Bureau.
By decade
Twin Lakes, decade by decade
One decade in the archive so far: the 1940s. Scroll each row; tap a photo for its story.
Nothing in the archives for these yearsWeddings on Main Street, storms, parades, school pictures, the old store. If it’s in your family album, it belongs here.
Twin Lakes is more historic than 8% of U.S. towns, #125 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 Twin Lakes?
0.8% of Twin Lakes’ homes were built before 1940 (Census estimate), against a typical 2.5% for a Colorado town; the median home was built in 1977.
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 the Library of Congress (3), 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.
1941
1941
1941
