Several unincorporated hamlets (Edgar, Horace, and Bloomfield) are located in the township.

According to the 2021 census gazetteer files, Edgar Township has a total area of 55.46 square miles (143.64 km2), all land.

[3] The township contains these six cemeteries: Bloomfield, Cherry Point, Franklin, Hoult, McKee and Scott.

The Edgar County Airport is located in the southeast part of the township.

CSX operates a north–south length of railroad track that connects Chrisman and Paris.