Karl Paul Schlegel (7 May 1893 – 27 October 1918) was a German World War I flying ace credited with 22 victories.

He was the last German ace to be killed in World War I. Karl Paul Schlegel was born in Wechselburg, the Kingdom of Saxony on 7 May 1893.

On 1 April 1912, he began active duty in the Royal Sachensburg Machine Gun Section #19 as a Gefreiter.

[1][2] Schlegel served in both France and Russia as a cavalry sergeant in the early days of World War I.

[1][2] In Spring 1917, he underwent pilot's training and was posted to a Saxon two-seater replacement unit, Fliegerersatz-Abteilung 6.