Not much is know of the origin of paper airplanes, and still to this day it remains a mystery as to where they originally started. There are however, two popular theories, one cites Leonardo da Vinci as the sole creator, and one even stems back to over 2,000 years ago. The latter refers to China, the place where modern paper was created, and also where paper kites were popular.
The earliest recording of modern paper airplanes dates back to the 1930's and to Jack Northrop. Jack was the co-founder of the Lockheed Corporation, an American based aerospace company, and used paper airplanes to test ideas for real-life aircraft that he was working on. These paper airplanes that Jack created later lead to the creation of aircrafts such as the B-2 stealth bomber.