Each edition grades its towns against each other only.
More historic than 26% of U.S. towns · #153 of 261 in Maryland. What drives it
Its Register listing is the Concord. Most of Walker Mill was built recently: 2% of its homes predate 1940 and the median home dates from 1973. Below: maps from 1900 on and the census since 1970.
More historic than 26% of U.S. towns, on its age, its old homes and the National Register.
On its age, its old homes and the National Register, Walker Mill is more historic than 26% of U.S. towns, #153 of 261 in Maryland. Its National Register listings hold the grade up; its share of homes from before 1940 pulls it down.
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 Walker Mill’s 0.9 sits near the middle of its state (48% of Maryland towns have fewer) while its 1 listings outnumber those of 51% of U.S. towns.
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 →
Read from the archive, the National Register and the record. The page puts what stands out first.
The first neighbors to add old photos shape how Walker Mill’s history is told.
Wikipedia doesn’t have a history of Walker Mill yet. The photos, dates and memories neighbors add here are how it gets written.
Walker Mill is an unincorporated area and census-designated place (CDP) in Prince George's County, Maryland, United States. Per the 2020 census, the population was 12,187.
Between the 2010 and 2020 censuses its population grew from 11,302 to 12,187 (+8%).
Intro from Wikipedia. Population: U.S. Census Bureau.
Woven from the archive, old maps, post office records, the National Register and the people born here.
BuiltConcord is built
On the mapFirst mapped by the U.S. Geological SurveyEvery edition of the U.S. Geological Survey’s map of Walker Mill. Tap a year, or press play to watch the town change.
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Walker Mill.
The country’s official list of buildings and places worth saving.
National Park Service, National Register of Historic Places. Photos from Wikimedia Commons, credited on each place’s page.
Between 6,322 and 12,187 people in every census since 1970.
6 censuses, 1970–2020.
U.S. Census Bureau decennial counts, from the census table on Walker Mill’s Wikipedia page.
Nobody well known was born in Walker Mill itself, so here are the best known from just nearby.
Another post office, Pine Grove, opened and closed inside today’s town.
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
Each neighbor’s History grade, on the same three inputs.
Walker Mill is more historic than 26% of U.S. towns, #153 of 261 in Maryland. 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.
One place: the Concord (listed 1982).
2% of Walker Mill’s homes were built before 1940 (Census estimate, ±2.3 points), against a typical 3.3% for a Maryland town; the median home was built in 1973.
What the archives can’t tell you, neighbors can.
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 National Register of Historic Places (1), 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.
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