The 30th Air Division (30th AD) is an inactive United States Air Force

United States Air Force

The United States Air Force is the aerial warfare service branch of the United States Armed Forces and one of the American uniformed services. Initially part of the United States Army, the USAF was formed as a separate branch of the military on September 18, 1947 under the National Security Act of...

 organization. Its last assignment was with Air Defense Command, assigned to Tenth Air Force

Tenth Air Force

The Tenth Air Force is a numbered air force of the United States Air Force Reserve Command . It is headquartered at Naval Air Station Joint Reserve Base Fort Worth, Texas....

, being stationed at Sioux City Municipal Airport

Sioux Gateway Airport

-History:The construction of Sioux City Army Air Base began in March 1942, about three months after the Japanese attack on Pearl Harbor. Opened on 5 July 1942, it became a major training center during World War II for crew members of B-24 Liberators and B-17 Flying Fortresses...

, Iowa

Iowa

Iowa is a state located in the Midwestern United States, an area often referred to as the "American Heartland". It derives its name from the Ioway people, one of the many American Indian tribes that occupied the state at the time of European exploration. Iowa was a part of the French colony of New...

. It was inactivated on 18 September 1968.
Assigned to Air Defense Command (ADC) for most of its existence, the division's initial mission was the air defense of the upper Great Lakes

Great Lakes

The Great Lakes are a collection of freshwater lakes located in northeastern North America, on the Canada – United States border. Consisting of Lakes Superior, Michigan, Huron, Erie, and Ontario, they form the largest group of freshwater lakes on Earth by total surface, coming in second by volume...

 region of the United States. The 30th equipped, administered, trained, and provided operationally ready forces to the appropriate commanders for air defense.