[4] Statewide, other Colerain Townships are located in Belmont and Ross counties.

[5] Fort Coleraine, aka Dunlap's Station, was one of the earliest attempts to settle the area despite the natives who had resided here for centuries without signing any land treaties.

The township is composed of 42.9 sq mi (111 km2) of gentle wooded hills separating the Mill Creek and Great Miami River basins, sloping down to the flood plain of the Miami.

As of 1990, 29% of the township's land had been urbanized, and 15% developed as agricultural property, while half remained as woodlands.

The township is crossed by Interstates 74 and 275, while the main north–south artery is Colerain Avenue (U.S. Route 27).

[2] The township is governed by a three-member board of trustees, who are elected in November of odd-numbered years to a four-year term beginning on the following January 1.