Joseph Ketchum Edgerton (February 16, 1818 – August 25, 1893) was an American lawyer and politician who served one term as a U.S. Representative from Indiana from 1863 to 1865.

Born in Vergennes, Vermont, Edgerton attended the public schools of Clinton County, New York.

He graduated from Plattsburgh Academy, which his older brother Alfred Peck Edgerton had also attended.

Edgerton also served as president of the Grand Rapids and Indiana Railroad and the Ohio Railroad, which were constructed to connect major cities of the Midwest, especially the booming industrial city of Chicago, through which many natural resources flowed to the East.

This article incorporates public domain material from the Biographical Directory of the United States Congress