Rainer Joseph Karl August Stahel (sometimes wrongly written as Reiner; 15 January 1892 – 30 November 1955) was a German military officer and war criminal.

At the end of May 1943, he was appointed commander of the new 22nd Flak Brigade in Italy and entrusted with protecting the Strait of Messina.

Following the German retreat from Sicily and Italy's surrender, Stahel was made the military commander of Rome in September 1943.

For his efforts, on 28 July 1944, he was awarded the Swords to the Knight's Cross and promoted to the rank of lieutenant general.

On the uprising's first day, Stahel was surrounded in his headquarters in the Saxon Palace, and he lost control of the situation.

According to initial Soviet sources, Stahel died on 30 November 1952 in Vladimir central transfer prison.

However, recent sources confirm that Stahel died in 1955 in the Voikovo officer prison camp of a heart attack when he was informed of his possible transfer to Germany.