As of the 2010 census, its population was 4,612 and it contained 1,953 housing units.

[2] The streams of Candy Brook, Deer Creek, Fair Brook, Honey Creek, Mechanicsburg Drain, Mud Creek, Painter Run, Sharp Run, Sugar Creek and Sweet Brook run through this township forming Fall Creek which meets White River in Indianapolis.

(This list is based on USGS data and may include former settlements.)

The township contains eight cemeteries: Fattic, Mechanicsburg, Miller, Keesling, Showalter, Pioneer, White Union, and Painter.

Fall Creek Township residents may obtain a free library card from the Middletown Fall Creek Library in Middletown.