ILRS

ILRS may refer to:


 * Indian Long Range Squadron – unit of the British Indian Army during World War II
 * International Laser Ranging Service – network of observation stations providing accurate measurement of satellite orbits
 * International League of Religious Socialists – umbrella organization of religious socialist movements in political parties throughout the world
 * International Lunar Research Station – planned lunar base currently being led by Roscosmos and the China National Space Administration