The Howard M. Metzenbaum U.S. Courthouse is a historic courthouse and post office building located on Superior Avenue in downtown Cleveland, Cuyahoga County, Ohio. Its west side faces Public Square and its north side faces The Mall. It was formerly the Federal Building and U.S. Courthouse and also known as Old Federal Building and Post Office.

Howard Morton Metzenbaum was an American politician and businessman who served for almost 20 years as a Democratic member of the U.S. Senate from Ohio. He also served in the Ohio House of Representatives and Senate from 1943 to 1951.