|Motto: "A Light on the Prairie"|
Location of Hennessey, Oklahoma
Hennessey is named after Pat Hennessy, an Irish freighter who was killed at the present townsite in April, 1874. He was said to have been burned on a wagon wheel, either by native Cheyenne tribesmen or white horse thieves.
The Pat Hennessey Memorial Park can be found at the streets of Iowa and Arapaho. The location of his body is another story. Pat Hennessey was originally buried next to the location of his death in a shallow grave. Rocks were placed over his body, and teamsters passing by would continue to place markers on his grave. At some point in history Pat’s body was moved. It is possible Pat’s relatives came from Ireland and reclaimed his body. In any case, it is not at the marker site at Memorial Park: excavations there produced no remains.
The town was laid out by the Hennessy Townsite Company after the land run of April 22, 1889. The Chicago, Kansas and Nebraska Railway, which was owned by the Chicago, Rock Island and Pacific Railway, built a line from Kansas through the Cherokee Outlet, and the first train arrived in September 1889. The town was incorporated on June 10, 1890.
According to the United States Census Bureau, the town has a total area of 3.7 square miles (9.6 km2), of which, 3.7 square miles (9.6 km2) of it is land and 0.04 square miles (0.10 km2) of it (0.53%) is water.