The United States Army CBRN School (USACBRNS), located at Fort Leonard Wood, Missouri, is a primary American training school specializing in military Chemical, Biological, Radiological, and Nuclear (CBRN) defense.

In accordance with U.S. Federal Law, Fort Leonard Wood, Missouri is designated as the central location for all of the Department of Defense's CBRN Operations Training, and is home to the U.S. Army's Chemical Corps Regiment.

Additionally, the US Air Force, US Navy, US Coast Guard and US Marine Corps also maintain training elements at Fort Leonard Wood, in partnership with the Army, to train their personnel in CBRN operations.

Opened in November 2007, the 1LT Joseph Terry Chemical, Biological, Radiological, Nuclear (CBRN) Responder Training Facility occupies approximately 22.5 acres (91,000 m2) and provides a CBRN Responder Training Campus for Inter-Service and other Agencies as requested.

The name change was to encompass the wide range of training and expertise maintained by the U.S. Army Chemical Corps in the title of the school.