Jan Willem Janssens

*Jonkheer*
Jan Willem Janssens
GCMWO
Jonkheer Jan Willem Janssens GCMWO
	Portrait by Jan Pieneman, c. 1815–1838
Governor-General of the Dutch East Indies
	In office; 15 May 1811 – 18 September 1811
Monarch	Napoleon Bonaparte
Preceded by	Herman Willem Daendels
Succeeded by	Robert Rollo Gillespie (as Lieutenant-Governor under British administration)
Governor of the Dutch Cape Colony
	In office; 1 March 1803 – 18 January 1806
Appointed by	Batavian Republic
Preceded by	Jacob Abraham Uitenhage de Mist
Succeeded by	David Baird (British administration)
Personal details
Born	12 October 1762; Nijmegen, Dutch Republic
Died	23 May 1838 (aged 75); The Hague, Netherlands
Spouses	; Anna Barbara Balneavis (m. 1786; died 1801) ; Sara Hartsen (m. 1822)
Children	5
Parents	Johan Janssens (father); Adriana Rees (mother);
Military service
Allegiance	French First Republic; First French Empire; Batavian Republic; Kingdom of Holland; Netherlands;
Branch/service	French Imperial Army; Batavian Army;
Years of service	1774–1815
Rank	Divisional general
Commands	Infantry Division
Battles/wars	French Revolutionary Wars; War of the Third Coalition Battle of Blaauwberg; ; War of the Fifth Coalition British conquest of Java; ; War of the Sixth Coalition Battle of Arcis-sur-Aube; ;
Awards	Order of the Union; Legion of Honour; Military William Order;

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Jonkheer Jan Willem Janssens GCMWO (12 October 1762 – 23 May 1838) was a Dutch military officer, colonial administrator and statesman who served both as the governor of the Dutch Cape Colony and governor-general of the Dutch East Indies.