[4] The town was named for Lucious Walter Long, the husband of Carrie M. Millerman, who had obtained a homestead in the Cheyenne-Arapaho Opening of April 19, 1892.

The Cainville post office was discontinued and moved to Longdale on November 28, 1903, with Robert L. Eaton as the new postmaster.

The Longs already had sold part of their property to the Kansas City, Mexico and Orient Railway, which finally reached Longdale on June 10, 1905.

[4] Carrie Millerman became the first teacher when a school opened November 30, 1894, in a temporary location 2 miles (3.2 km) north of Longdale.

According to the United States Census Bureau, the town has a total area of 0.3 square miles (0.78 km2), all land.

As of the 2000 United States Census[update],[3] there were 310 people, 114 households, and 81 families residing in the town.