| Els de Groen | |
| Office: | Member of the European Parliament for the Netherlands |
| Term Start: | 2004 |
| Term End: | 2009 |
| Birth Date: | 23 December 1949 |
| Birth Place: | The Hague, Netherlands |
| Birth Name: | Elly Kouwenhoven |
Elly de Groen-Kouwenhoven (pronounced as /nl/; ; born 23 December 1949), generally known as Els de Groen, is a Dutch author and politician, who served as a Member of the European Parliament 2004–2009. She was a member of Europe Transparent, which sat with the Greens/EFA party group. As an MEP, she was a member of the Committee on Civil Liberties, Justice and Home Affairs and the Committee on Petitions, as well as a member of the delegation to the EU - Bulgaria Joint Parliamentary Committee and a substitute for the delegation for relations with the countries of Southeast Europe.