| Honorific-Prefix: | Ministeri (Minister) |
| Ilkka Suominen | |
| Office1: | Speaker of the Parliament of Finland |
| Term Start1: | 2 April 1987 |
| Term End1: | 5 May 1987 |
| Predecessor1: | Erkki Pystynen |
| Successor1: | Matti Ahde |
| Term Start2: | 30 April 1991 |
| Term End2: | 6 February 1993 |
| Predecessor2: | Esko Aho |
| Successor2: | Riitta Uosukainen |
| Office3: | President of the Nordic Council |
| Term Start3: | 1992 |
| Term End3: | 1992 |
| Predecessor3: | Anker Jørgensen |
| Successor3: | Jan P. Syse |
| Birth Date: | 8 April 1939 |
| Birth Place: | Nakkila, Finland |
| Party: | National Coalition Party |
| Spouse: | Riitta Suominen |
Ilkka Olavi Suominen (8 April 1939 – 23 May 2022)[1] was a Finnish politician from the National Coalition Party. He was President of the Nordic Council in 1992.
He was a member of the parliament from 1970 to 1975 and from 1983 to 1994. Suominen was the chairman of the National Coalition Party 1979–1991 and twice the speaker of the parliament 1987 and 1991–1994. He held the position of minister of trade and industry in Holkeri cabinet 1987–1991.[2] Suominen left parliament to become CEO of state monopoly Alko.[3] He was elected as a member of the European Parliament (MEP) for one term between 1999 and 2004 (EPP).
He was also the chairman of the Parliamentary Assembly of the OSCE 1992–1994.