IL-20

IL-20 or IL 20 may refer to:


 * Interleukin 20, a protein in humans
 * Illinois's 20th congressional district, an obsolete district
 * Illinois Route 20
 * Ilyushin Il-20 (1948), a prototype Soviet ground attack aircraft
 * Ilyushin Il-20M, a military variant of the Soviet-era Il-18 turboprop aircraft