Founding year: Wikidata; Wikipedia’s history section gives the same year.The full story ↓
History grade
What drives Colmar Manor’s History grade
On its age, its old homes and the National Register, Colmar Manor is more historic than 40% of U.S. towns. Its share of homes from before 1940 holds the grade up; its age pulls it down.
C+
HistoryA character grade: shown, never part of Colmar Manor’s overall grade.
Few Maryland towns list much on the Register (a typical Maryland town has 0.9 per 10,000 residents, the U.S. 2.4), so Colmar Manor’s 0.0 sits below most of its state (20% of Maryland towns have fewer) while its 0 listings outnumber those of 23% of U.S. towns.
How sure. Graded on any two of the three inputs instead, the letter would range from D− to B+. The pre-1940 share is a Census survey estimate (±14.0 points). Two sources give 1927.
Founding year: Wikidata (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 Colmar Manor’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
The town is home to Dueling Creek, formerly in Bladensburg, Maryland, a small waterway that because of its secluded location was a popular site for dueling. Duels were banned in neighboring Washington, D.C., but legal in Maryland, and Dueling Creek was the site for more than 50 duels between 1808 and 1868. The most famous duel fought on the site was on March 22, 1820, between Stephen Decatur and James Barron. Decatur was mortally wounded in the exchange.
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.
In 1927, according to Wikidata and Wikipedia’s history of the town. the census of 1930 counted 1,225 people here.
How does Colmar Manor rank for history?
Colmar Manor is more historic than 40% 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 Colmar Manor?
61% of Colmar Manor’s homes were built before 1940 (Census estimate, ±14.0 points), against a typical 3.3% for a Maryland town; the median home was built in 1938.
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 (6), the Library of Congress (6), Wikipedia, 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.