Treaty of Westminster may refer to:
Treaty of Westminster (1153), also known as the Treaty of Wallingford Treaty of Westminster (1462), also known as the Treaty of Westminster-Ardtornish Treaty of Westminster (1511), an alliance during the War of the League of Cambrai Treaty of Westminster (1527), an alliance during the War of the League of Cognac Treaty of Westminster (1654), ending the First Anglo-Dutch War Triple Alliance (1668), concluded in Westminster between Sweden, the General States and Great Britain Treaty of Westminster (1674), ending the Third Anglo-Dutch War Treaty of Westminster (1756), establishing neutrality between Great Britain and Prussia The Statute of Westminster 1931, which transformed the British Empire into the British Commonwealth of Nations, is sometimes referred to (particularly in the former dominions) as a "Treaty" of Westminster