Located in the southeastern part of the county along the Ohio River, it borders the following townships: Letart Township is composed of a peninsula jutting southward into the Ohio River.

It is located in the middle of Meigs County's Ohio River townships.

The township name comes from Letart Falls on the Ohio River, named for a Frenchman James Le Tort who reportedly drowned in the falls.

[5] David Sayre (1736-1826) and his family were said to have been the first settlers in what is now Letart Township,[6] arriving in 1803 from New Jersey by way of western Virginia.

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.