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B−History
History · Cockeysville

Cockeysville’s post office opened in 1848, and 1 of its places is on the National Register

More historic than 47% of U.S. towns · #101 of 261 in Maryland. What drives it

Most of Cockeysville was built recently: 3% of its homes predate 1940 and the median home dates from 1978. Its Register listing is the Baltimore County School No. 7. Below: 12 old photos and papers, maps from 1894 on, and the census since 1980.

1848first post office
1on the National Register
3%homes built before 1940
12old photos & papers
1famous people
Add an old photoShare a memory
From Cockeysville’s archive · credits on each photo
Quick answers

How Cockeysville began

When was Cockeysville founded?

1848

The Cockeysville post office opened in 1848, the earliest record of the town by name. Eight smaller post offices, Warren (1834), Ellengowan (1850) and Taylor Hall (1850), opened inside today’s town and later closed.

First census: 17,013 in 19802020 census: 24,184178 years

How historic is Cockeysville?

B−

More historic than 47% of U.S. towns, on its age, its old homes and the National Register.

What drives the grade ↓
Founding year: the first Cockeysville post office (Blevins & Helbock, CC0).The full story ↓
History grade

What drives Cockeysville’s History grade

On its age, its old homes and the National Register, Cockeysville is more historic than 47% of U.S. towns, #101 of 261 in Maryland. Its age holds the grade up; its share of homes from before 1940 pulls it down.

B−
HistoryA character grade: shown, never part of Cockeysville’s overall grade.
Founding era1848, from the first post office: founded 1776–1849, an older era than 75% of U.S. townsA−Homes built before 19402.6% of homes (±1.1) · typical MD town 3.3% · U.S. 8.4%C−National Register1 listing, 0.4 per 10,000 residents · typical MD town 0.9 · U.S. 2.4B−
All U.S. towns we grade (21,289)Ahead of 47%
NewerOlder
Maryland towns of 2,500+ (261)Ahead of 62%

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 Cockeysville’s 0.4 sits near the middle of its state (42% of Maryland towns have fewer) while its 1 listings outnumber those of 51% of U.S. towns.

How sure. Graded on any two of the three inputs instead, the letter would range from C to B. The pre-1940 share (±1.1 points) is firm at this size. The founding year is the first post office, not a stated founding date.

Founding year: the first post office (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 Cockeysville’s past

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

Lost villages8 post offices opened and closed inside today’s Cockeysville, and 18 old place names are still on the map.On the map since 18947 editions of the USGS map, 1894 to 1986. Watch Cockeysville change.A town in old photos12 old photos, postcards and papers, 1898–1936.Deep rootsA post office since 1848: 178 years of Cockeysville.
★ What stands out · Places that used to be

Lost post offices, old corners, places now gone and burying grounds

Cockeysville’s post office has been open since 1848. Eight other post offices opened and closed inside today’s town.

Warren
1834–1922
Cockeysville
1848–today
Ellengowan
1850–1880
Taylor Hall
1850–1850
Ashland
1872–1933
The Caves
1878–1879
Saint Joseph
1879–1881
Texas
1880–1951
Dulaneys
1896–1906
18301930today
Hamlets and corners on the map
AshlandBeacon HillDulaney GateDun RovinGreentop ManorHunt ValleyHunters RunMarble HillMilestone ManorOverlookSherwoodSherwood HillsSpringdaleTexasThe LakesTimberline ParkTown and Country NorthWarren
Gone or out of use
Campbell QuarrymineTowson Nurserieslocale
1cemetery inside Cockeysville
Dulaney Valley Memorial Gardens

US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).

On the map

Cockeysville on the map, 1894 to 1986

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

Cockeysville on the 1894 USGS mapCockeysville on the 1904 USGS mapCockeysville on the 1943 USGS mapCockeysville on the 1957 USGS mapCockeysville on the 1966 USGS mapCockeysville on the 1974 USGS mapCockeysville on the 1986 USGS map1894Baltimore 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 Cockeysville.

By decade

Cockeysville, decade by decade

2 decades in the archive, from the 1890s to the 1930s. Scroll each row; tap a photo for its story.

1890s2 items
Beaver Dam Quarry Plate XX WBClark 18981898Beaver Dam Quarry Plate XX WBClark 1898Monolith Fig 1 Plate XXII WBClark 18981898Monolith Fig 1 Plate XXII WBClark 1898
1900s–1920snothing yet
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.
Add from your album
1930s10 items
9927-9929 Railroad Avenue (Duplex), 9927-9929 Railroad Avenue, Texas, Baltimore County, MD19339927-9929 Railroad Avenue (Duplex), 9927-9929 Railroa…9937 Railroad Avenue (House), 9937 Railroad Avenue, Texas, Baltimore County, MD19339937 Railroad Avenue (House), 9937 Railroad Avenue, T…Historic American Buildings Survey E. H. Pickering, Photographer August 1936 JOHN MERRYMAN'S LETTER HEAD. - Hayfields F…1936Historic American Buildings Survey E. H. Pickering, P…DocumentHistoric American Buildings Survey E. H. Pickering, Photographer August 1936 BIG BARN COW STALLS OUTSIDE MAIN WALL - Ha…1936Historic American Buildings Survey E. H. Pickering, P…Historic American Buildings Survey E. H. Pickering, Photographer August 1936 BIG BARN SHED LEAN-TO ALONG SOUTH WALL - H…1936Historic American Buildings Survey E. H. Pickering, P…Historic American Buildings Survey E. H. Pickering, Photographer August 1936 BRICK HORSE BARN, WAGON SHED FROM EAST - H…1936Historic American Buildings Survey E. H. Pickering, P…Historic American Buildings Survey E. H. Pickering, Photographer August 1936 COACHMAN'S HOUSE FROM WEST - Hayfields Far…1936Historic American Buildings Survey E. H. Pickering, P…Historic American Buildings Survey E. H. Pickering, Photographer August 1936 IMPLEMENT SHED - Hayfields Farm Buildings,…1936Historic American Buildings Survey E. H. Pickering, P…Historic American Buildings Survey E. H. Pickering, Photographer August 1936 PRIVY AND GARDEN WALL - Hayfields Farm Bui…1936Historic American Buildings Survey E. H. Pickering, P…Historic American Buildings Survey E. H. Pickering, Photographer August 1936 SLAVES MESS HALL, PRIVY AND GARDEN WALL - …1936Historic American Buildings Survey E. H. Pickering, P…
1940s–1990snothing yet
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.
Add from your album
The story

How Cockeysville came to be

From Wikipedia’s history of Cockeysville.

Read it all →

The low-lying valleys in and around Cockeysville are underlain by a soft, crystalline metamorphic rock called Cockeysville Marble. This rock, which was once limestone at the bottom of an ancient sea, erodes much faster than the surrounding harder schist. This process created fertile, rolling valleys with rich, lime-sweetened soils. These valleys supported mature hardwood forests. Dominant tree species would have included tulip poplar, American chestnut, various oaks (white, red, black), hickories, black walnut, and American elm. The understory would have had flowering shrubs and herbaceous plants like pawpaw, spicebush, mayapple, Virginia bluebells, and various ferns. Large mammals such as white-tailed deer, elk, and black bears were abundant. The area was also home to predators like mountain lions and bobcats. Smaller mammals included beavers, river otters, gray foxes, and woodland bis…

ChaptersNaturalPrehistoricColonial era19th century20th century21st centuryMarble industryTexas, Maryland

Text from Wikipedia, licensed CC BY-SA 4.0.

Timeline

Cockeysville, 1834 to 1933

Woven from the archive, old maps, post office records, the National Register and the people born here.

  1. 19th century
  2. 1834Post officeThe Warren post office opens
  3. 1848Post officeThe Cockeysville post office opens
  4. 1850Post officeThe Ellengowan post office opens
  5. 1880Post officeThe Ellengowan post office closes
  6. 1894On the mapFirst mapped by the U.S. Geological Survey
  7. 1898In the archiveBeaver Dam Quarry Plate XX WBClark 1898
  8. 20th century
  9. 1922Post officeThe Warren post office closes
  10. 1932Born hereWilliam E. Leber is born here
  11. 1933In the archive9927-9929 Railroad Avenue (Duplex), 9927-9929 Railroad Avenue, Texas, Baltimore County, MD
Then & now

Stand where they stood

No then-and-now pairs yet. Take a photo from the same spot as an old one and they appear here side by side.

Beaver Dam Quarry Plate XX WBClark 1898
Retake this viewBeaver Dam Quarry Plate XX WBClark 1898, 1898

Find the spot, match the angle, and add your photo. It becomes the first then-and-now pair on Cockeysville’s page.

Retake this view · +15
On the National Register

1 historic place in Cockeysville

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
first listed
2000
Baltimore County School No. 7
Baltimore County School No. 7
Buildings

Architectural styles listings

Queen Anne1
Baltimore County School No. 7Queen Anne

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

People over time

Cockeysville, census by census

05,00010,00015,00020,00025,000198020002020Peak: 24,184

Between 17,013 and 24,184 people in every census since 1980.

5 censuses, 1980–2020.

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

Help out

Finish Cockeysville’s story

Most archives stop around 1920. The photos from after that are in family albums, not libraries.

Decades since 1900 with photos
00s10s20s30s40s50s60s70s80s90s
1 of 10 decades. The empty ones are waiting for someone’s album.
Retake an old viewBeaver Dam Quarry Plate XX WBClark 1898: stand where they stood+15Share a family photoSign in to add one+10
Stories next door

History across the town line

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

TimoniumIts storyCMays Chapel1 historic placeB−

Questions about Cockeysville’s history

What year was Cockeysville founded?

The Cockeysville post office opened in 1848, the earliest record of the town by name (U.S. post office records).

How does Cockeysville rank for history?

Cockeysville is more historic than 47% of U.S. towns, #101 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.

What is on the National Register in Cockeysville?

One place: the Baltimore County School No. 7 (listed 2000).

How old are the homes in Cockeysville?

3% of Cockeysville’s homes were built before 1940 (Census estimate, ±1.1 points), against a typical 3.3% for a Maryland town; the median home was built in 1978.

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), the National Register of Historic Places (1), Wikipedia, 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.