Timonium is located at 39°26′26″N 76°37′34″W (39.4441, -76.6076). According to the United States Census Bureau, the CDP has a total area of 5.4 square miles (13.9 km), all of it land.

The town is north of Baltimore City 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 Interstate 83. Ridgely Road forms the boundary between Timonium and Lutherville, while Padonia Road separates Timonium from Cockeysville.

Timonium is located in the Piedmont region of the United States, and lies 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).

Transportation

Roads

Major roads in the Timonium area include:

Public transportation

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

Notable people

Education