[4] Salt River Township covers an area of 111.7 square miles (289.3 km2).

It contains part of one incorporated city, Mexico (the county seat).

Unincorporated places include Champ, Francis (railroad station; formerly Felton), Molino (former post office), Ortiz (railroad station; formerly Doan, and also known as Ortiz Station), Salt River (former post office), and Young's Creek (former post office).

There are four cemeteries in the township: Elmwood, Mount Zion, Saint Brendans and Trinity.

This Audrain County, Missouri state location article is a stub.