Leslie Charles (Clarence) Allen, (9 November 1916 – 11 May 1982), nicknamed "Bull" Allen, was an Australian soldier and a recipient of the United States' Silver Star.
A stretcher-bearer, Allen enlisted in the Second Australian Imperial Force in mid-1940, volunteering for overseas service.
He was posted to the 2/5th Battalion, an infantry unit, and deployed to the Middle East where he saw action in the Western Desert and Syria–Lebanon Campaigns, before his unit returned to Australia in 1942.
He subsequently served in New Guinea.
In July 1943, Allen took part in the Battle of Mount Tambu where he rescued twelve United States soldiers who had been wounded in the fighting.
For this action he was awarded the Silver Star.
He returned to Australia later in the year and was eventually medically discharged in 1944 after his mental health deteriorated.
After the war, he worked as a labourer and as a medical orderly.