| Honorific-Prefix: | His Excellency |
| Maan Sassen | |
| Office: | Permanent Representative of the Netherlands to the European Union |
| Term Start: | 1 January 1971 |
| Term End: | 1 January 1977 |
| Predecessor: | Unknown |
| Successor: | Unknown |
| Office1: | European Commissioner for Competition |
| Term Start1: | 30 June 1967 |
| Term End1: | 30 June 1970 |
| President1: | Jean Rey |
| Predecessor1: | Hans von der Groeben |
| Successor1: | Albert Borschette |
| Office2: | Member of the European Parliament |
| Term Start2: | 1 January 1958 |
| Term End2: | 13 February 1958 |
| Parliamentarygroup2: | Christian Democratic Group |
| Constituency2: | Netherlands |
| Office3: | Member of the European Coal and Steel Community Parliament |
| Term Start3: | 10 September 1952 |
| Term End3: | 1 January 1958 |
| Parliamentarygroup3: | Christian Democratic Group |
| Constituency3: | Netherlands |
| Office4: | Member of the Senate |
| Term Start4: | 13 November 1956 |
| Term End4: | 4 February 1958 |
| Term Start5: | 15 July 1952 |
| Term End5: | 6 November 1956 |
| Parliamentarygroup5: | Catholic People's Party |
| Office6: | Minister of Colonial Affairs |
| Term Start6: | 7 August 1948 |
| Term End6: | 14 February 1949 |
| Primeminister6: | Willem Drees |
| Predecessor6: | Jan Jonkman |
| Successor6: | Johan van Maarseveen |
| Office7: | Member of the House of Representatives |
| Term Start7: | 4 June 1946 |
| Term End7: | 7 August 1948 |
| Parliamentarygroup7: | Catholic People's Party |
| Birthname: | Emmanuel Marie Joseph Antony Sassen |
| Birth Date: | 11 September 1911 |
| Birth Place: | 's-Hertogenbosch, Netherlands |
| Death Place: | 's-Hertogenbosch, Netherlands |
| Nationality: | Dutch |
| Party: | Christian Democratic Appeal (from 1980) |
| Otherparty: | Catholic People's Party (1945–1980) Roman Catholic State Party (1938–1945) |
| Occupation: | Politician |
Emmanuel Marie Joseph Antony "Maan" Sassen (11 September 1911 – 20 December 1995) was a Dutch politician, who served as European Commissioner for Competition in the Rey Commission from 1967 to 1971.[1]
Sassen studied law and earned a doctorate. From 1936 to 1950 he worked as a lawyer and district attorney. In 1939 he became a member of the States of North Brabant. In 1946 he was elected to the Dutch House of Representatives for the Katholieke Volkspartij (KVP). He served as Minister responsible for the Dutch Colonies (1948–1949) and as European Commissioner for Competition in the Rey Commission from 1967 to 1971.
He was a member of the Common Assembly of the European Coal and Steel Community from its establishment in 1952 and was the first President of the Christian Democratic group, the predecessor of the European People's Party Group.