Throughout history there have been many alliances and organizations known as the Catholic League, including:

• Catholic League (USA) - Civil rights group in the United States.
• Catholic League (German) - 17th century alliance of German Catholic States during the Thirty Years War
• Catholic League (Italian) - Alliance led by the Papal States during the Italian Wars
• Catholic League (French) - Faction during the French Wars of Religion

The were also several Holy Leagues, equally Roman Catholic:

• Holy League (Mediterranean) - a Catholic states' alliance that won the Battle of Lepanto (1571)
• Holy League (Great Turkish war) - composed of European powers against the Ottoman Empire at the end of the 17th century