Stefan Eugeniusz Tyszkiewicz, in Polish, Stefan Eugeniusz Maria Tyszkiewicz-Lohojski z Landwarowa, Leliwa coat of arms, (born 24 November 1894 in Warsaw, died 6 February 1976 in London) was a member of the Polish nobility, landowner, engineer, inventor and an early pioneer of the Polish automotive industry.
He was a decorated veteran of both World Wars and the Polish-Bolshevik War and social activist.
After 1945, he became an exile, turned to publishing and politics as a member of the Polish National Council in London.
He was an internationally feted inventor to the end of his life.