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CHistory
History · Glassmanor

1 of Glassmanor’s places is on the National Register

More historic than 34% of U.S. towns · #130 of 261 in Maryland. What drives it

Most of Glassmanor was built recently: 5% of its homes predate 1940 and the median home dates from 1973. Below: maps from 1900 on and the census since 1980.

1on the National Register
5%homes built before 1940
Add an old photoShare a memory
Quick answers

About Glassmanor’s history

How historic is Glassmanor?

C

More historic than 34% of U.S. towns, on its age, its old homes and the National Register.

What drives the grade ↓
History grade

What drives Glassmanor’s History grade

On its age, its old homes and the National Register, Glassmanor is more historic than 34% of U.S. towns, #130 of 261 in Maryland. Its National Register listings hold the grade up; its share of homes from before 1940 pulls it down.

C
HistoryA character grade: shown, never part of Glassmanor’s overall grade.
Founding eraNo founding year we can rely on, so the grade uses the other two–Homes built before 19405.4% of homes (±3.0) · typical MD town 3.3% · U.S. 8.4%CNational Register1 listing, 0.6 per 10,000 residents · typical MD town 0.9 · U.S. 2.4B−
All U.S. towns we grade (21,289)Ahead of 34%
NewerOlder
Maryland towns of 2,500+ (261)Ahead of 50%

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 Glassmanor’s 0.6 sits near the middle of its state (43% of Maryland towns have fewer) while its 1 listings outnumber those of 51% 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 (±3.0 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 Glassmanor’s past

Read from the archive, the National Register and the record. The page puts what stands out first.

A history waiting to be writtenNo old photos of Glassmanor are in the public archives yet. The rest are in attics and albums.On the map since 19003 editions of the USGS map, 1900 to 1979. Watch Glassmanor change.
★ What stands out · Help out

Start Glassmanor’s collection

The first neighbors to add old photos shape how Glassmanor’s history is told.

Decades since 1900 with photos
00s10s20s30s40s50s60s70s80s90s
0 of 10 decades. The empty ones are waiting for someone’s album.
Share a family photoSign in to add one+10
On the map

Glassmanor on the map, 1900 to 1979

Every edition of the U.S. Geological Survey’s map of Glassmanor. Tap a year, or press play to watch the town change.

Glassmanor on the 1900 USGS mapGlassmanor on the 1945 USGS mapGlassmanor on the 1979 USGS map1900Washington sheet · 1:62,500

U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Glassmanor.

The story so far

Glassmanor, in brief

Wikipedia doesn’t have a history of Glassmanor yet. The photos, dates and memories neighbors add here are how it gets written.

Glassmanor is an unincorporated community and census-designated place in Prince George's County, Maryland, United States. As of the 2020 census, it had a population of 18,430. In the 1990 and 2000 censuses, the United States Census Bureau had placed Glassmanor and the adjacent community of Oxon Hill in the "Oxon Hill-Glassmanor" census-designated place for statistical purposes. Glassmanor was last delineated separately in 1980, when the CDP recorded a population of 7,751. The original Glassmanor apartments were built circa 1950 by the Glassman company, just outside the border of southeast Washington. In the mid-1950s, the Eastover shopping center was built across the highway, followed by ot…

Between the 2010 and 2020 censuses its population grew from 17,295 to 18,430 (+7%).

Intro from Wikipedia. Population: U.S. Census Bureau.

By decade

Glassmanor, decade by decade

Today12 recent
2020-08-21 11 59 51 View west along Maryland State Route 414 (Saint Barnabas Road) at the exit for Interstate 95-Inters…20202020-08-21 11 59 51 View west along Maryland State Ro…2020-08-21 11 52 38 View west along Maryland State Route 414 (Saint Barnabas Road) at Wheeler Road on the edge of Marlo…20202020-08-21 11 52 38 View west along Maryland State Ro…2019-05-27 14 17 52 View north along the outer loop of the Capital Beltway (Interstate 95 and Interstate 495) at Exit 4…20192019-05-27 14 17 52 View north along the outer loop o…2019-05-27 13 56 42 View south along the inner loop of the Capital Beltway (Interstate 95 and Interstate 495) at the sp…20192019-05-27 13 56 42 View south along the inner loop o…2019-05-27 13 54 44 View south along the inner loop of the Capital Beltway (Interstate 95 and Interstate 495) at Exit 4…20192019-05-27 13 54 44 View south along the inner loop o…2016-09-07 12 35 08 View south along Maryland State Route 210 (Indian Head Highway) at Oxon Run Drive in Glassmanor, Pr…20162016-09-07 12 35 08 View south along Maryland State R…2016-07-04 08 45 46 View south along the inner loop of the Capital Beltway (Interstate 95 and Interstate 495) 1-4 mile …20162016-07-04 08 45 46 View south along the inner loop o…2016-07-04 08 45 26 View south along the inner loop of the Capital Beltway (Interstate 95 and Interstate 495) at the sp…20162016-07-04 08 45 26 View south along the inner loop o…2016-07-04 08 45 13 View south along the inner loop of the Capital Beltway (Interstate 95 and Interstate 495) 3-4 mile …20162016-07-04 08 45 13 View south along the inner loop o…2016-07-04 08 44 53 Sign describing distances to approaching local lane exits along the southbound inner loop of the Ca…20162016-07-04 08 44 53 Sign describing distances to appr…2016-07-04 08 44 34 View south along the inner loop of the Capital Beltway (Interstate 95 and Interstate 495) at Exit 4…20162016-07-04 08 44 34 View south along the inner loop o…2016-01-22 09 09 36 View north along the outer loop of the Capital Beltway (Interstate 95 and Interstate 495) at Exit 4…20162016-01-22 09 09 36 View north along the outer loop o…
On the National Register

1 historic place in Glassmanor

The country’s official list of buildings and places worth saving.

place listed
1
National Historic Landmarks
0
none yet
historic buildings protected
1
each building in a district counts

National Park Service, National Register of Historic Places. Photos from Wikimedia Commons, credited on each place’s page.

People over time

Glassmanor, census by census

05,00010,00015,00020,00019802000202018,430

Grew from 7,751 people in 1980 to 18,430 in 2020.

3 censuses, 1980–2020.

U.S. Census Bureau decennial counts, from the census table on Glassmanor’s Wikipedia page.

Famous people

Famous people close to Glassmanor

Nobody well known was born in Glassmanor itself, so here are the best known from just nearby.

See all →
Al GoreVice President of the United States from 1993 t… · b. 1948
Samuel L. JacksonAmerican actor · b. 1948
Jennifer DoudnaAmerican biochemist · b. 1964
Dermot MulroneyAmerican actor · b. 1963
Jeff KinneyAmerican author and cartoonist · b. 1971
Angus KingAmerican politician and lawyer · b. 1944
Places that used to be

Old corners and burying grounds

Old hamlets and crossroads still carry their names on the map.

Hamlets and corners on the map
Barnaby Manor Oaks
1cemetery inside Glassmanor
B'nai Israel

Places and cemeteries from the USGS Geographic Names Information System (2021).

Stories next door

History across the town line

Each neighbor’s History grade, on the same three inputs.

Forest Heights3 historic placesCMarlow HeightsIts storyDHillcrest Heights1 historic placeCOxon Hill1 historic placeC

Questions about Glassmanor’s history

How does Glassmanor rank for history?

Glassmanor is more historic than 34% of U.S. towns, #130 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.

How old are the homes in Glassmanor?

5% of Glassmanor’s homes were built before 1940 (Census estimate, ±3.0 points), against a typical 3.3% for a Maryland town; the median home was built in 1973.

Memory lane

What the archives can’t tell you, neighbors can.

Town Square →
Start a conversation
Sources

Where this page comes from

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 (12), 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.