Located in southeastern Montgomery County, Whitemarsh Township was Incorporated in 1704 as part of Philadelphia County, and was one of the 28 original communities that comprised Montgomery County upon its founding in 1784. Adjacent to the Andorra section of Philadelphia, it is surrounded in Montgomery County by Springfield, Upper Dublin, Whitpain, and Plymouth Townships and Conshohocken Borough. It is also bordered by the Schuylkill River, which separates it from Lower Merion Township.
Regionally, Whitemarsh Township is well known as the home of Fort Washington State Park, Hope Lodge/Mathers Mill, Germantown Academy, Plymouth Whitemarsh High School, and McNeil Consumer Healthcare, one of the largest private employers in Montgomery County. The Township is also the site of six golf courses: Whitemarsh Valley Country Club, Sunnybrook Country Club, Green Valley Country Club, The Ace Club, and two courses of the Philadelphia Cricket Club.