| Charles Poswick | |
| Office: | President of the Parliament of the French Community |
| Term Start: | 16 October 1984 |
| Term End: | 2 December 1985 |
| Predecessor: | Michel Toussaint |
| Successor: | Jean-Pierre Grafé |
| Birth Date: | 6 October 1924 |
| Birth Place: | Limbourg, Belgium |
| Death Place: | Zolder, Belgium |
| Nationality: | Belgian |
| Party: | Reformist Movement |
| Alma Mater: | Catholic University of Leuven |
Charles Marie Jean Joseph Elvire Ghislain baron Poswick (6 October 1924 – 28 July 1994) was a Belgian politician for the PLP. Poswick was doctor in Law and licentiate in commercial and financial sciences.
He became para-commando and broker. Poswick was a member of parliament (1965–1991) for the PLP for the district Namur and President of the French community Council (1984–1985) and of the Walloon district Council (1985–1988). He was minister of defence from 1966 up to 1968 and in 1980.