Hendrik Jan "Henk" Zeevalking (7 June 1922 – 23 February 2005) was a Dutch politician and co-founder of the Democrats 66 (D66) party and jurist.

Henk Zeevalking
Henk Zeevalking in 1981
Minister of Transport and Water Management
In office 11 September 1981 – 4 November 1982
Prime Minister	Dries van Agt
Preceded by	Dany Tuijnman
Succeeded by	Neelie Kroes
Chairman of the Democrats 66
In office 27 October 1979 – 11 September 1981
Leader	Jan Terlouw
Preceded by	Jan Glastra van Loon
Succeeded by	Cees Spigt (Ad interim)
Mayor of Rijswijk
In office 16 January 1979 – 11 September 1981
Preceded by	Hans Grosheide
Succeeded by	Riet Daamen-van Houte
Member of the House of Representatives
In office 8 June 1977 – 24 January 1979
Parliamentary group	Democrats 66
State Secretary for Justice
In office 6 June 1975 – 8 September 1977
Prime Minister	Joop den Uyl
Preceded by	Jan Glastra van Loon
Succeeded by	Bert Haars
Mayor of Utrecht
In office 1 February 1974 – 6 September 1974 Ad interim
Preceded by	Hans van Tuyll van Serooskerken
Succeeded by	Henk Vonhoff
Personal details
Born	Hendrik Jan Zeevalking (1922-06-07)7 June 1922 Laag-Keppel, Netherlands
Died	23 February 2005(2005-02-23) (aged 82) Delft, Netherlands
Political party	Democrats 66 (from 1966)
Other political affiliations	People's Party for Freedom and Democracy (1956–1966)
Spouse	Dinie Brugman ​ (m. 1948)​
Children	3 children
Alma mater	Utrecht University (Bachelor of Laws, Master of Laws)
Occupation	Politician · Jurist · Lawyer · Businessman · Corporate director · Nonprofit director · Academic administrator · Author

Zeevalking attended a Gymnasium in Utrecht from April 1934 until June 1940 and applied at the Utrecht University in January 1946 majoring in Law and obtaining a Bachelor of Laws degree in August 1946 before graduating with a Master of Laws degree in December 1947. Zeevalking worked as a researcher at the Utrecht University from December 1947 until February 1950. Zeevalking worked as a criminal defense lawyer in Utrecht from February 1950 until September 1970. Zeevalking served on the Municipal Council of Utrecht from April 1970 until June 1975 and served as an Alderman in Utrecht from September 1970 until September 1974. Zeevalking served as acting Mayor of Utrecht from 1 February 1974 until 6 September 1974 following the retirement of Hans van Tuyll van Serooskerken.

Zeevalking was appointed as State Secretary for Justice in the Cabinet Den Uyl following the resignation of Jan Glastra van Loon, taking office on 6 June 1975. The Cabinet Den Uyl fell on 22 March 1977 after four years of tensions in the coalition and continued to serve in a demissionary capacity. Zeevalking was elected as a Member of the House of Representatives after the election of 1977, taking office on 8 June 1977 but he was still serving in the cabinet and because of dualism customs in the constitutional convention of Dutch politics he couldn't serve a dual mandate he subsequently resigned as State Secretary for Justice on 8 September 1977. In December 1978 Zeevalking was nominated as Mayor of Rijswijk, he was installed as Mayor, taking office on 16 January 1979 and subsequently resigned as a Member of the House of Representatives on 24 January 1979. Zeevalking also served as Chairman of the Democrats 66 from 27 October 1979 until 11 September 1981. After the election of 1981 Zeevalking was appointed as Minister of Transport and Water Management in the Cabinet Van Agt II, taking office on 11 September 1981. The Cabinet Van Agt II fell just seven months into its term on 12 May 1982 after months of tensions in the coalition and continued to serve in a demissionary capacity until the first cabinet formation of 1982 when it was replaced by the caretaker Cabinet Van Agt III with Zeevalking continuing as Minister of Transport and Water Management, taking office on 29 May 1982. In August 1982 Zeevalking announced his retirement from national politics and that he wouldn't stand for the election of 1982. The Cabinet Van Agt III was replaced by the Cabinet Lubbers I following the second cabinet formation of 1982 on 4 November 1982.