| Birth Date: | 2 October 1962 |
| Birth Place: | Zoutelande, Netherlands |
| Party: | Christian Democratic Appeal |
| Office: | Member of the House of Representatives |
| Term Start: | 30 November 2006 |
| Term End: | 19 September 2012 |
| Occupation: | Politician |
| Birth Name: | Adriaan Jacobus Koppejan |
Adriaan Jacobus (Ad) Koppejan (born 2 October 1962, in Zoutelande) is a former Dutch politician. As a member of the Christian Democratic Appeal (Christen-Democratisch Appèl) he was an MP from 30 November 2006 to 19 September 2012. He focused on matters of fishery and water policy, administrative burden and corporate social responsibility.
Koppejan is a member of the Protestant Church in the Netherlands (PKN).