Camp Hulen was a military training camp near Palacios, Texas, United States that operated from 1925 until 1946, and at one time supported the largest concentration of troops for field training in the United States military. Camp Palacios was established in 1925 as a summer training camp for the 36th Infantry of the Texas National Guard. The camp was renamed for Major John A. Hulen (1871–1957) in 1930. In 1940, the War Department leased Camp Hulen for anti-aircraft training of National Guard units from around the country.