South Cle Elum is a town in Kittitas County, Washington, United States.

[3] In 1909, the Chicago, Milwaukee & Puget Sound Railway chose Cle Elum as a division point between the Coast and Columbia divisions on its future transcontinental line.

Maintenance shops and workers' bunkers were built as well as a train station.

According to the United States Census Bureau, the town has a total area of 0.39 square miles (1.01 km2), all land.

30.2% of all households were made up of individuals, and 11.5% had someone living alone who was 65 years of age or older.

29.7% of all households were made up of individuals, and 15.1% had someone living alone who was 65 years of age or older.

South Cle Elum is classified as a town and has a non-partisan mayor–council form of government, with the mayor and five council members elected at-large for staggered four-year terms.