The Jarrettsville post office opened in 1838, the earliest record of the town by name. Another post office, Carman's (1826), opened inside today’s town and later closed.
2020 census: 2,888188 years
How historic is Jarrettsville?
C
More historic than 30% of U.S. towns, on its age, its old homes and the National Register.
Founding year: the first Jarrettsville post office (Blevins & Helbock, CC0).The full story ↓
History grade
What drives Jarrettsville’s History grade
On its age, its old homes and the National Register, Jarrettsville is more historic than 30% of U.S. towns, #142 of 261 in Maryland. Its age holds the grade up; its share of homes from before 1940 pulls it down.
C
HistoryA character grade: shown, never part of Jarrettsville’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 Jarrettsville’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 C+. The pre-1940 share (±2.2 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 Jarrettsville’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Lost post offices, old corners and burying grounds
Jarrettsville’s post office has been open since 1838. Another post office, Carman's, opened and closed inside today’s town.
Carman's
1826–1838
Jarrettsville
1838–today
18201920today
Hamlets and corners on the map
Advocate Hill FarmsClover FieldCool Meadows FarmsDulaney RidgeFederal Hill HeightsGreen ValleyHarford DownsHunt CrestJarrettswoodNorth Harford Heights
4cemeteries and burying grounds inside Jarrettsville
JarrettsvilleMooresNorth HarfordSalem United Methodist
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
On the map
Jarrettsville on the map, 1901 to 1974
Every edition of the U.S. Geological Survey’s map of Jarrettsville. Tap a year, or press play to watch the town change.
1901Belair 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 Jarrettsville.
The area was originally called Carmon. The town was named for the Jarrett family, who farmed the area during the 1800s and were one of the first pioneer families of the United States. In 1771, Abraham Jarrett was granted 2,380 acres of land near the falling branch area to which was used for the production of hogshead barrels mainly used for the transportation of tobacco. In the same year Abraham Jarrett purchased other areas in and around the Jarrettsville area. Abraham Jarrett married Martha Bussey and had 7 children. My Lady's Manor was listed on the National Register of Historic Places in 1978, and includes portions of Jarrettsville. Other sources attribute the naming of Jarrettsville to the grandson of Abraham Jarrett, Luther M. Jarrett, a state delegate and farmer.
The Jarrettsville post office opened in 1838, the earliest record of the town by name (U.S. post office records).
How does Jarrettsville rank for history?
Jarrettsville is more historic than 30% of U.S. towns, #142 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 Jarrettsville?
1% of Jarrettsville’s homes were built before 1940 (Census estimate, ±2.2 points), against a typical 3.3% for a Maryland town; the median home was built in 1983.
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), Wikipedia, Wikidata and Wikipedia for famous people, U.S. Geological Survey historical maps, 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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