| Ossi Oikarinen | |
| Birth Date: | 3 May 1970 |
| Nationality: |  Finnish |
Ossi Oikarinen (born 3 May 1970) is a Finnish engineer who works in Formula One.
Oikarinen began his Formula One career with Arrows in and continued in its employment until . He worked at Toyota from to as race engineer for Cristiano da Matta and later Jarno Trulli and moved to BMW Sauber in and to Ferrari in 2009.