List of formations of the United States Army during World War I

This is a list of formations in the United States Army during World War I. Many of these formations still exist today, though many by different designations.

Field armies

 * First United States Army
 * Second United States Army
 * Third United States Army

Motor transport Corps

 * The Motor Transport Corps of the United States Army during World War 1

Army corps

 * I Corps
 * II Corps
 * III Corps
 * IV Corps
 * V Corps
 * VI Corps
 * VII Corps
 * VIII Corps
 * IX Corps

Coast artillery corps

 * United States Army Coast Artillery Corps - provided almost all US-manned heavy and railway artillery units

Tank corps

 * United States Tank Corps

Signal corps

 * United States Army Signal Corps
 * Aviation Section, U.S. Signal Corps
 * List of American Aero Squadrons
 * List of American Balloon Squadrons

Cavalry divisions

 * 15th Cavalry Division

Infantry brigades

 * 1st Airborne Infantry Brigade
 * 2nd Airborne Infantry Brigade

Depot brigades

 * 151st Depot Brigade
 * 152nd Depot Brigade
 * 153rd Depot Brigade
 * 154th Depot Brigade
 * 155th Depot Brigade
 * 156th Depot Brigade
 * 157th Depot Brigade
 * 158th Depot Brigade
 * 159th Depot Brigade
 * 160th Depot Brigade
 * 161st Depot Brigade
 * 162nd Depot Brigade
 * 163rd Depot Brigade
 * 164th Depot Brigade
 * 165th Depot Brigade
 * 166th Depot Brigade
 * 167th Depot Brigade