Lieutenant General Stafford LeRoy Irwin (March 23, 1893 – November 23, 1955) was a senior United States Army officer who served in World War II.

After General Manton Eddy resigned from his position due to health issues, Irwin commanded the XII Corps from April 20, 1945, through the end of the war.

Many of Irwin's classmates became general officers during World War II, including Dwight D. Eisenhower, Omar Bradley, Henry Aurand, John W. Leonard, James Van Fleet, Joseph May Swing, Charles W. Ryder, Paul J. Mueller, Roscoe B. Woodruff, Vernon Prichard, Leland Hobbs, and numerous others.

[2] During the interwar period Irwin, realizing the cavalry was becoming obsolete (which trench warfare and World War I had shown), transferred to the Field Artillery Branch.

[citation needed] After the war, Irwin returned to the United States and became commander of V Corps in 1946 and director of the Military Intelligence Division in 1948.