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Timonium, Maryland

Coordinates: 39°26′26″N 76°37′34″W / 39.44056°N 76.62611°W / 39.44056; -76.62611
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Timonium, Maryland
The Maryland State Fair in Timonium
The Maryland State Fair in Timonium
Location of Timonium, Maryland
Location of Timonium, Maryland
Coordinates: 39°26′26″N 76°37′34″W / 39.44056°N 76.62611°W / 39.44056; -76.62611
Country United States
State Maryland
County Baltimore
 • Total6.54 sq mi (16.95 km2)
 • Land5.72 sq mi (14.82 km2)
 • Water0.82 sq mi (2.13 km2)
 • Total10,458
 • Density1,828.00/sq mi (705.82/km2)
Time zoneUTC−5 (Eastern (EST))
 • Summer (DST)UTC−4 (EDT)
ZIP Codes
Area code(s)410, 443
FIPS code24-78050

Timonium /ˌtɪˈmnəm/ is a census-designated place (CDP) in Baltimore County, Maryland, United States. As of the 2010 census it had a population of 9,926.[2] Prior to 2010 the area was part of the Lutherville-Timonium CDP.

The Maryland State Fair is held in Timonium each year near Labor Day on the grounds of the former Timonium Race Course, which is an important site along with Pimlico Race Course in northwest Baltimore and Laurel Park in Prince George's County, along with other former tracks at Bowie and Rosecroft in Maryland thoroughbred horse racing traditions.



Timonium takes its name from the Timonium Mansion, the home of Mrs. Archibald Buchanan, who, in melancholia due to the loss of eyesight and the death of a close friend, felt her life was like that of Mark Antony after the Battle of Actium. The original Timonium was an incomplete palace Mark Antony built on the island of Antirhodos in the harbor of Alexandria, Egypt. Antony died by suicide at the palace after receiving a false report that Cleopatra had died by suicide.[3]



Timonium is at 39°26′26″N 76°37′34″W / 39.44056°N 76.62611°W / 39.44056; -76.62611 (39.4441, −76.6076).[4] According to the United States Census Bureau, the CDP has a total area of 5.4 square miles (13.9 km2), all land.[5]

The town is north of Baltimore along York Road (Maryland Route 45). It is bordered on the north by Cockeysville, on the south by Lutherville, on the east by Loch Raven Reservoir, and on the west by Falls Road (Maryland Route 25), with the Greenspring and Worthington Valleys beyond. Ridgely Road forms the boundary between Timonium and Lutherville, while Padonia Road separates Timonium from Cockeysville.

Timonium is in the Piedmont region of the United States, and is in the transition zone between the Humid subtropical climate zone to the south and the humid continental climate to the north, with hot and humid summers leading into winters that are cold but not extreme by American standards. The average annual snowfall is 25 inches (64 cm) and average annual rainfall is 42 inches (107 cm).


Historical population
Separated from Lutherville-Timonium CDP in 2010 Census [6]


Timonium Fairgrounds station
Baltimore and Susquehanna Railroad historical marker, Timonium light rail station



Major roads in the Timonium area include:

Public transportation


The Maryland Transit Administration's light rail line has two stops in the Timonium area: Timonium and Fairgrounds. In addition, bus routes 8 and 9 provide regular service along the York Road corridor.

Notable people



Public schools


  1. ^ "2020 U.S. Gazetteer Files". United States Census Bureau. Retrieved April 26, 2022.
  2. ^ "Profile of General Population and Housing Characteristics: 2010 Demographic Profile Data (DP-1): Timonium CDP, Maryland". United States Census Bureau. Retrieved February 23, 2012.
  3. ^ Kenny, Hamill (1984). The Placenames of Maryland : their origin and meaning. Baltimore, Md.: Maryland Historical Society. p. 264. ISBN 0-938420-28-3.
  4. ^ "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. February 12, 2011. Retrieved April 23, 2011.
  5. ^ "Geographic Identifiers: 2010 Demographic Profile Data (G001): Timonium CDP, Maryland". United States Census Bureau. Retrieved February 23, 2012.
  6. ^ "Census of Population and Housing". Census.gov. Retrieved June 4, 2016.
  7. ^ "Timonium, site, (Belle Field, Bellefields) Architectural Survey File" (PDF). Maryland Historical Trust. May 17, 2012. Archived from the original (PDF) on May 23, 2023.
  8. ^ Barone, Michael; Ujifusa, Grant (1999). The Almanac of American Politics 2000. National Journal Group Inc. p. 748.