Lloyd James Austin III (born August 8, 1953) is a retired United States Army general who served as the 28th United States secretary of defense from 2021 to 2025.

Before retiring from the military in 2016, Austin served as the 12th commander of United States Central Command (CENTCOM), beginning in March 2013. Prior to that he served as the 33rd vice chief of staff of the Army from January 2012 to March 2013, and as commander of United States Forces – Iraq from September 2010 to December 2011. He is the first African American to hold each of these positions. After retiring from the armed services, Austin joined the boards of Raytheon Technologies, Nucor, Tenet Healthcare, and Auburn University. On December 7, 2020, he was nominated for defense secretary by then-president-elect Joe Biden and was confirmed by the United States Senate on January 22, 2021, by a vote of 93–2.

Austin holds the unique distinction of having commanded in combat in Iraq and Afghanistan at the one-, two-, three- and four-star levels, and was the first African American to command a division, corps, and field army in combat. He is a recipient of the Silver Star, the nation's third highest award for valor, for his actions during the Iraq invasion, as well as five Defense Distinguished Service Medals.

Lloyd James Austin III was born on August 8, 1953, in Mobile, Alabama. He was raised in Thomasville, Georgia. In 1975, he graduated from the United States Military Academy at West Point with a Bachelor of Science degree. While at the academy, Austin played rugby and ran track. He later earned a Master of Arts degree in counselor education from Auburn University's College of Education in 1986, and a Master of Business Administration in business management from Webster University in 1989. He is a graduate of the Infantry Officer Basic and Advanced courses, the Army Command and General Staff College, and the Army War College.

In June 1975, Austin graduated from West Point and was commissioned in the Infantry as a second lieutenant. He completed Airborne and Ranger schools prior to receiving his initial assignment in Germany with the 3rd Infantry Division (Mechanized) as a rifle platoon leader and later as a scout platoon leader and company executive officer in 1st Battalion, 7th Infantry.

Following this assignment and attendance at the Infantry Officer Advanced Course, he was assigned to the 82nd Airborne Division at Fort Bragg, North Carolina, where he commanded the Combat Support Company, 2nd Battalion (Airborne), 508th Infantry and served as the Assistant S-3 (Operations) for 1st Brigade. In 1981, Austin was assigned to Indianapolis, Indiana, where he was the operations officer for the Army Indianapolis District Recruiting Command, and where he later commanded a company in the Army Recruiting Battalion. Upon conclusion of this assignment, he attended Auburn University, where he completed studies for a Master's in education. He then returned to West Point as a company tactical officer.

After completion of the Army Command and General Staff College, Fort Leavenworth, Kansas, he was assigned to the 10th Mountain Division (Light Infantry), Fort Drum, New York, where he served as the S-3 (Operations) and later executive officer for the 2nd Battalion, 22nd Infantry. He subsequently served as Executive Officer for 1st Brigade, 10th Mountain, and later Director of Plans, Training, Mobilization, and Security for Fort Drum.

In 1993, Austin returned to the 82nd Airborne Division where he commanded the 2nd Battalion (Airborne), 505th Infantry. He later served as G-3 for the 82nd.