Anti-Partition League may refer to:
Unionist Anti-Partition League (1919–22), founded by St John Brodrick, 1st Earl of Midleton Anti-Partition League (1938–39), successor to the National League of the North Irish Anti-Partition League (1945–58), Northern Ireland nationalist party All Ireland Anti-Partition League (1948–50), political organisation based in Northern Ireland
See also Partition of Ireland Opposition to the partition of India