The 21st Indian Infantry Division was a division of the Indian Army during World War II. It was formed in April 1944. in Assam. It never saw any combat and its only sub unit was the 268th Indian Infantry Brigade. The division was disbanded and its units transferred to become the 44th Airborne Division in June 1944.
On formation, 268th Indian Infantry Brigade, converted from 268th Indian Armoured Brigade in August 1942, consisted of 17/7th Rajput Regiment, 2/4th Bombay Grenadiers, 5/4th Bombay Grenadiers, 2nd Battalion, The King's Own Scottish Borderers, 2nd Battalion, The South Lancashire Regiment, 429th Field Company Indian Engineers, and 45 Cavalry.
- The Indian Army 1914-1947 By Ian Sumner, p.25
- "21 Indian Infantry Division". Order of Battle. Retrieved 2009-10-15.
- Kenneth Conboy et al, Elite Forces of India and Pakistan, p.8