The 2020 census found 3,832 people in the township.

Located in the southeastern corner of the county along the Ohio River, it borders the following townships: West Virginia lies across the Ohio River to the east: Brooke County to the northeast, and Ohio County to the southeast.

Three villages are located along the Ohio River in southeastern Warren Township: Two unincorporated communities: Warren Township was founded in 1802.

[5] 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.

There is also an elected township fiscal officer,[6] who serves a four-year term beginning on April 1 of the year after the election, which is held in November of the year before the presidential election.