IL or Il may refer to:
Illinois (/ˌɪlᵻˈnɔɪ/ IL-i-NOY) is a state in the midwestern region of the United States, achieving statehood in 1818. It is the 6th most populous state and 25th largest state in terms of land area, and is noted as a microcosm of the entire country.
The Ilyushin Il-76 (NATO reporting name: Candid) is a multi-purpose four-engine turbofan strategic airlifter designed by the Soviet Union's Ilyushin design bureau.
Illusory superiority is a cognitive bias whereby individuals overestimate their own qualities and abilities, relative to others.
The Ilyushin Il-2 (Cyrillic: Илью́шин Ил-2) Sturmovik was a ground-attack aircraft (Cyrillic: Штурмови́к, Šturmovík) produced by the Soviet Union in large numbers during the Second World War.