Catholic League may refer to:
- Catholic League (French), created by Henry of Guise, in 1576 during the French Wars of Religion
- Catholic League (German), a confederation of Catholic German states formed to counteract the Protestant Union
- Catholic League (U.S.), a Roman Catholic civil rights organization in the United States
In sports:
- Philadelphia Catholic League, a high school sports league composed of 20 Catholic High Schools in and around Philadelphia
- Baltimore Catholic League, a competitive basketball association composed of private Catholic high schools in the Baltimore, Maryland area
- New Orleans Catholic League, a high school athletic league in the New Orleans, Louisiana area
Holy League may refer to:
- Holy League (1495), AKA "League of Venice", alliance of several opponents of French hegemony in Italy, arranged by Pope Alexander VI
- League of Cambrai, anti-Venetian alliance that included Louis XII of France, Holy Roman Emperor Maximilian I, and Ferdinand I of Spain, created by Pope Julius II
- Holy League (1538), a short-lived alliance of Christian states arranged by Pope Paul III at the urging of the Republic of Venice
- Holy League (1571), arranged by Pope Pius V and included almost all the major Catholic maritime states in the Mediterranean
- Holy League (1684), initiated in by Pope Innocent XI, composed of the Holy Roman Empire, the Venetian Republic and Poland
