On its age, its old homes and the National Register, Keenesburg is more historic than 32% of U.S. towns. Its share of homes from before 1940 holds the grade up; its National Register listings pull it down.
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HistoryA character grade: shown, never part of Keenesburg’s 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 Keenesburg’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.
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 is a Census survey estimate (±6.7 points).
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 Keenesburg’s 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 Keenesburg yet. The photos, dates and memories neighbors add here are how it gets written.
The Town of Keenesburg is a Statutory Town in Weld County, Colorado, United States. The population was 1,250 at the 2020 United States census. It is home to The Wild Animal Sanctuary.
Between the 2010 and 2020 censuses its population grew from 1,127 to 1,250 (+11%).
Intro from Wikipedia. Population: U.S. Census Bureau.
Timeline
Keenesburg, 1907 to 1985
Woven from the archive, old maps, post office records, the National Register and the people born here.
Every edition of the U.S. Geological Survey’s map of Keenesburg. Tap a year, or press play to watch the town change.
1950Keenesburg sheet · 1:24,000
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Keenesburg.
People over time
Keenesburg, census by census
Grew from 164 people in 1920 to 1,250 in 2020, 7 times over.
11 censuses, 1920–2020.
U.S. Census Bureau decennial counts, from the census table on Keenesburg’s Wikipedia page.
Places that used to be
Old corners
Old hamlets and crossroads still carry their names on the map.
Hamlets and corners on the map
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US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
Questions about Keenesburg’s history
How does Keenesburg rank for history?
Keenesburg is more historic than 32% of U.S. towns. 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 Keenesburg?
13% of Keenesburg’s homes were built before 1940 (Census estimate, ±6.7 points), against a typical 2.5% for a Colorado town; the median home was built in 2004.
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 (4), the Library of Congress (2), Wikidata and Wikipedia for famous people, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia), the US Post Offices dataset (Blevins & Helbock) 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.