William Ponsonby (British Army officer)

The Honourable Sir William Ponsonby KCB
Portrait engraving published in 1817
Member of Parliament for Londonderry
In office 1812–1815
Preceded by	Lord George Thomas Beresford
Succeeded by	George Robert Dawson
Personal details
Born	(1772-10-13)13 October 1772 Ireland
Died	18 June 1815(1815-06-18) (aged 42) Waterloo, Belgium
Cause of death	Killed in action
Spouse	Georgiana FitzRoy
Military service
Allegiance	United Kingdom
Branch/service	British Army
Years of service	1794–1815
Rank	Major-General
Unit	5th Dragoon Guards
Commands	2nd Union Cavalry Brigade
Battles/wars	French Revolutionary Wars Irish Rebellion of 1798 Battle of Ballinamuck Napoleonic Wars Peninsular War Siege of Badajoz Battle of Villagarcia Battle of Salamanca Battle of Majadahonda Siege of Burgos Battle of Vitoria Battle of Toulouse Hundred Days Battle of Waterloo †

Major-General Sir William Ponsonby KCB (13 October 1772 – 18 June 1815) was an Anglo-Irish politician and British Army officer who served in the Peninsular War and was killed at the Battle of Waterloo.