Sembach Kaserne is a United States Army post in Donnersbergkreis, Germany, near Kaiserslautern. It is approximately 19 miles (31 km) east of Ramstein Air Base. From 1995 to 2012 the installation was a United States Air Force installation known as Sembach Air Base, until it was given back to the United States Army. Prior to 1995 it was known as Sembach Air Auxiliary Field.

Named for the municipality of Sembach, it is the home of AFN Europe, U.S. Army Europe Band, 10th Army Air and Missile Defense Command, Medical Readiness Command-Europe, 68th Medical Group, U.S. Army NATO Brigade, 18th Military Police Brigade, 30th Medical Brigade, United States Army Corrections Facility-Europe, DoDEA Europe, and AAFES Europe, Africa, and Southwest Asia. During the Cold War, the installation housed a variety of U.S. tactical reconnaissance, close air support and tactical air control units as a front line NATO air base.