Quadruple Alliance may refer to:
The 1718 alliance between Austria, France, the Netherlands, and Great Britain during the War of the Quadruple Alliance The alliance between Great Britain, Austria, the Netherlands, and Saxony in the Treaty of Warsaw (1745) to uphold the Pragmatic Sanction The Quadruple Alliance (1815) between the United Kingdom, Austria, Prussia, and Russia following the Napoleonic Wars The 1834 Quadruple Alliance between the United Kingdom, France, Spain, and Portugal to enforce the Concession of Evoramonte The Quadruple Alliance (1915-1918) another name for the Central Powers of World War I
See also Triple Alliance (disambiguation) Quadripartite Agreement (disambiguation) Quintuple Alliance