Olivier Dassault (French pronunciation: [ɔlivje daso]; 1 June 1951 – 7 March 2021) was a French politician and billionaire businessman, who served as a deputy in the National Assembly.

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Olivier Dassault
Olivier Dassault in 2013
Member of the National Assembly for Oise's 1st constituency
In office 21 June 2002 – 7 March 2021
Preceded by	Yves Rome
Succeeded by	Victor Habert-Dassault
In office 1988–1997
Succeeded by	Yves Rome
Personal details
Born	(1951-06-01)1 June 1951 Boulogne-Billancourt, France
Died	7 March 2021(2021-03-07) (aged 69) Touques, Calvados, France
Cause of death	Helicopter crash
Political party	The Republicans
Spouses	Carole Tranchant ​ ​ (m. 1989, divorced)​ Natacha Nikolajevic ​ ​ (m. 2009)​
Relations	Laurent Dassault (brother) Victor Habert-Dassault (nephew)
Children	3
Parent(s)	Serge Dassault (father) Nicole Raffel (mother)
Alma mater	École de l'air
Military service
Allegiance	France
Branch/service	French Air and Space Force
Years of service	1970s

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Born in Boulogne-Billancourt, he was the son of businessman and politician Serge Dassault and his wife Nicole (née Raffel), and the grandson of industrialist Marcel Dassault. Dassault graduated from École de l'air as a combat engineering officer and pilot in 1974. He was then a reserve member of the French Air Force.

In June 2002, he was elected as deputy for the first circonscription of Oise, running on the Union for a Popular Movement (UMP) ticket, the first to hold this office following the shift from Proportional Representation. He was re-elected in 2007.^[1]

A scion of the founding family of the aerospace engineering company Dassault Group, he worked in a number of roles within the family firm. He was president of Dassault Communications, president of the board of directors of French publisher Valmonde (a former family property), member of the board of the French financial newspaper Journal des Finances and an administrator of Dassault subsidiary Socpresse.^{[citation needed]}

In April 2020, his net worth was estimated to be US$4.7 billion.^[2]

He was a 1974 graduate of the Air Force Academy (École de l'air) and held a master's degree in mathematics (1976) as well a doctorate in business management computing (1980). During his lifetime, he cultivated a passion for photography and published several books of his photographs. Dassault was also a composer and musician, and contributed scores for several movies in the late 1970s and early 1980s.^[3]

Dassault died on 7 March 2021 when the Eurocopter AS350 Écureuil helicopter he was in crashed in Touques in northwestern France. He was 69 years old. The pilot, the only other person on board, was also killed.^[5][6][7][8]