A league is:

• an ancient unit of length of an hour's walk, see league (unit),
• an administrative division in Inner Mongolia. See League (Inner Mongolia).

League is also a term used to denote a collective entity. A league can be:

• a group of individuals, such as the League of Women Voters or The Red-Headed League (story by Sir Arthur Conan Doyle)
• a group of clubs, such as a sports league; see List of professional sports leagues for examples of this use
• a group of countries with a common purpose. Examples include:
  • League of Nations
  • Hanseatic League
  • Peloponnesian League
  • Catholic League