ILL, or Ill, or ill may refer to:

• 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 Roman Tool Crack 22

• Illness, a generally-used synonym for disease
• Koji Nakamura (recording under the name iLL), a Japanese musician
• Tommy Ill, Wellington in New Zealand based rapper
• I Love Lucy, a landmark American television sitcom
• Interlibrary loan
• Template:Interlanguage link, a template in multiple Wikipedias

• III (disambiguation)
• I'll (disambiguation)