Herman Onno Christiaan Rudolf "Onno" Ruding (born 15 August 1939) is a retired Dutch politician of the Christian Democratic Appeal (CDA) party and businessman.^[1]

Onno Ruding
Onno Ruding in 1985
Member of the Social and Economic Council
In office 1 February 1990 – 21 March 1992
Chairman	Theo Quené
Member of the House of Representatives
In office 3 June 1986 – 14 juli 1986
Parliamentary group	Christian Democratic Appeal
Minister of Finance
In office 4 November 1982 – 7 November 1989
Prime Minister	Ruud Lubbers
Preceded by	Fons van der Stee
Succeeded by	Wim Kok
Personal details
Born	(1939-08-15) 15 August 1939 (age 84) Breda, Netherlands
Political party	Christian Democratic Appeal (from 1980)
Other political affiliations	Catholic People's Party (1967–1980)
Spouse	Renée Ruding ​ (m. 1969)​
Children	3 daughters
Residence(s)	Wassenaar, Netherlands
Alma mater	Erasmus University Rotterdam (Bachelor of Economics, Master of Economics, Doctor of Philosophy)
Occupation	Politician · Civil servant · Economist · Researcher · Businessman · Banker · Financial adviser · Financial analyst · Corporate director · Nonprofit director · Trade association executive · Author · Lobbyist
Military service
Allegiance	Netherlands
Branch/service	Royal Netherlands Army
Years of service	1964–1965 (Conscription) 1965–1969 (Reserve)
Rank	Corporal
Unit	Regiment van Heutsz
Battles/wars	Cold War

Ruding worked as student researcher at the Erasmus University Rotterdam from June 1964 until July 1969 and worked as a civil servant for the Ministry of Finance from February 1965 until June 1971 and as Deputy Director-General of the department for International Monetary Affairs from February 1965 until September 1966 and Director-General of the Department for International Monetary Affairs from September 1966 until June 1971. Ruding worked as an investment banker for the AMRO Bank from June 1971 until January 1977. In December 1976 Ruding was nominated as an Executive Director of the International Monetary Fund (IMF), taking office on 1 January 1977. In December 1980 Ruding was nominated as CFO and Vice Chairman of the Board of directors of the AMRO Bank, he resigned as Executive Director of the International Monetary Fund on 31 December 1980 and was installed as CFO and Vice Chairman of the AMRO Bank on 1 January 1981.

After the election of 1982 Ruding was appointed as Minister of Finance in the Cabinet Lubbers I, taking office on 4 November 1982. Ruding was elected as a Member of the House of Representatives after the election of 1986, taking office on 3 June 1986. Following the cabinet formation of 1986 Ruding continued as Minister of Finance in the Cabinet Lubbers II, taking office on 14 July 1986. On 3 May 1989 the Cabinet Lubbers II fell and continued to serve in a demissionary capacity. In July 1989 Ruding announced that he would not stand for the election of 1989. The Cabinet Lubbers II was replaced by the Cabinet Lubbers III on 7 November 1989. Ruding retired from active politics and returned to the private sector and public sector, in December 1989 Ruding was nominated as a Chairman of the Christian Employers' association (NCW), taking office on 1 January 1990. In February 1992 Ruding was nominated as Vice Chairman of the Board of directors of Citigroup, he resigned as Chairman of the Christian Employers' association on 21 March 1992 the same day he was installed as Vice Chairman of the Board of directors of Citigroup. In December 1999 Ruding was appointed as COO of Citibank Europe, serving from 1 January 2000 until 1 October 2003.

Following his retirement Ruding remains active in the private sector and public sector and continues to occupy numerous seats as a corporate director and nonprofit director on several supervisory boards (Centre for European Policy Studies, Society for Statistics and Operations Research, NIBC Bank, International Statistical Institute and the Tinbergen Institute).