[1] The center of Big Creek Township is located at 38°52′16″N 98°59′02″W / 38.87111°N 98.98389°W / 38.87111; -98.98389 (38.8711228, −98.9839787) at an elevation of 1,890 feet (580 m).

[2] The township lies in the Smoky Hills region of the Great Plains.

Salt Creek, a tributary of the Saline River, flows east through the northern part of the township.

[6][7] Interstate 70 and U.S. Route 40 run concurrently east–west through Big Creek Township, interchanging with 176th Street, a paved north–south county road, one mile south of Gorham.

The former alignment of U.S. 40 runs broadly east–west through Gorham and the township, connecting to a network of mostly unpaved county roads laid out in a rough grid pattern.