Ill

ILL, or Ill, or ill may refer to:

== Places == Ill (France), a river in Alsace, France, tributary of the Rhine Ill (Vorarlberg), a river in Vorarlberg, Austria, tributary of the Rhine Ill (Saarland), a river of Saarland, Germany, tributary of the Theel Illinois (traditionally abbreviated: Ill.), a state in the midwestern region of the United States Illorsuit Heliport (location identifier: ILL), a heliport in Illorsuit, Greenland Institut Laue–Langevin, a research centre in Grenoble, France Willmar Municipal Airport (IATA code: ILL), a city-owned public use airport