| Type: | Bishop |
| Honorific-Prefix: | His Excellency |
| Clément Guillon | |
| Bishop of Quimper | |
| Church: | Roman Catholic Church |
| See: | Diocese of Quimper |
| Term: | 1989-2007 |
| Predecessor: | Francis Barbu |
| Successor: | Jean-Marie Le Vert |
| Ordination: | 5 May 1957 |
| Consecration: | 10 April 1988 |
| Consecrated By: | Francis Barbu |
| Rank: | Bishop |
| Birth Date: | 27 April 1932 |
| Birth Place: | Plessé, France |
| Death Place: | Redon, France |
Clément Joseph Marie Raymond Guillon (27 April 1932 – 9 July 2010) was the Roman Catholic bishop of the Roman Catholic Diocese of Quimper, France.
Ordained to the priesthood on 5 May 1957, Guillon was made coadjutor bishop of the Quimper Diocese on 17 March 1988 and was ordained bishop on 10 April 1988. He became the diocesan bishop on 3 May 1989, retiring on 7 December 2007.