Léon Levavasseur (Cherbourg, 1863 - Paris, 1922) was a French aviation pioneer.
He filed a patent for an 8-cylinder engine in 1902 and created the Antoinette company in 1904. In 1905, he received an order from Captain Ferdinand Ferber for a 24hp engine. Very quickly all the manufacturers of the time used its engines.
In 1908, he built the Antoinette II which was his first airplane. Hubert Latham became the company's test pilot in 1909.
In 1910, on the initiative of Commanders Clolus and Laffont and Lieutenant Clavenad, his company built the first training devices for ground instruction in the piloting of its aircraft. The "Antoinette barrel" is one of the very first flight simulators.
He died in Paris on June 24, 1922.