| Lena Ek | |
| Office: | Minister for the Environment |
| Primeminister: | Fredrik Reinfeldt |
| Term Start: | 29 September 2011 |
| Term End: | 3 October 2014 |
| Predecessor: | Andreas Carlgren |
| Successor: | Åsa Romson |
| Birth Date: | 16 January 1958 |
| Birth Place: | Mönsterås, Sweden |
| Party: | Centre Party |
| Spouse: | Anders Ek |
| Children: | 4, including Magnus Ek |
| Alma Mater: | Lund University |
Lena Ek (born 16 January 1958) is a Swedish politician who served as Minister for the Environment from 2011 to 2014. She is a former Member of the European Parliament and Member of the Riksdag. She is a member of the Centre Party, part of the Alliance of Liberals and Democrats for Europe.
She sat on the European Parliament's Committee on Industry, Research and Energy. She was also a substitute for the Committee on Women's Rights and Gender Equality and the Committee on the Environment, Public Health and Food Safety, and a member of the delegation to the ACP-EU Joint Parliamentary Assembly.
Her son, Magnus Ek, was chairman of the Centre Party Youth from 2015 to 2019.