The United States Army's Officer Candidate School (OCS) is an officer candidate school located at Fort Moore, Georgia, that trains, assesses, and evaluates potential commissioned officers of the U.S. Army, U.S. Army Reserve, and Army National Guard. Officer candidates are former enlisted members, warrant officers, inter-service transfers, or civilian college graduates who enlist for the "OCS Option" after they complete Basic Combat Training (BCT). The latter are often referred to as college ops.

An officer candidate school (OCS) is a military school which trains civilians and enlisted personnel in order for them to gain a commission as officers in the armed forces of a country. How OCS is run differs between countries and services. Typically, officer candidates have already attained post-secondary education, and sometimes a bachelor's degree, and undergo a short duration of training which focuses primarily on military skills and leadership. This is in contrast with a military academy which includes academic instruction leading to a bachelor's degree.