Stewart Cathey, Jr. (born April 19, 1981) is an American politician and businessman from the state of Louisiana. A Republican, Cathey has represented the 33rd district of the Louisiana State Senate, covering Monroe and surrounding areas, since 2020.
After graduating from the University of Louisiana at Monroe, Cathey joined the U.S. Army in 2003, where he served as a commissioned officer and army engineer. He deployed for a second time in 2016. Cathey has additionally worked as a managing partner at the Cathey Group since 2013.
In 2015, Cathey ran for the 35th district of the Louisiana State Senate, losing to fellow Republican James R. Fannin. Cathey ran again for the State Senate in 2019, this time in the neighboring 33rd district, and defeated Republican former West Monroe Chamber of Commerce chairman Wade Bishop with 52% of the vote.