 Jefferson Township is bordered by Lincoln Township to the northeast, Somerset Township to the east, Milford Township to the southeast, Middlecreek Township to the southwest, and Westmoreland County to the northwest.Laurel Hill Creek begins in Jefferson Township, with additional tributaries such as Crab Run, Clear Run, Shanks Run, Shafer Run, Moore Run, Kooser Run, Gross Run, Crise Run, Buck Run, and Jones Mill Run joining its stream before it enters Middlecreek Township.Forbes State Forest, Laurel Hill State Park, and Kooser State Park are located in Jefferson Township.