Western Alliance may refer to:
Western Alliance Bancorporation, an American bank holding company Western Alliance, a New Zealand rugby league competition created in 2003 – see Manawatu Rugby League Western Alliance Challenge Series, original name of the Western Soccer Alliance, a former soccer league in the United States and Canada Western Alliance, a bloc of nations in Maiden Rose, a Japanese manga series
See also NATO, a military alliance with 30 member states Western Allies, a political and geographic grouping among the Allied Powers of World War II Western Bloc, a Cold War-era coalition of nations that included NATO Western Union (alliance), a predecessor of NATO Big Four (Western Europe)