| Rein Ratas | |
| Office1: | Member of the Riigikogu |
| Term Start1: | 2007 |
| Term End1: | 2011 |
| Term Start2: | 2015 |
| Term End2: | 2018 |
| Birth Date: | 9 May 1938 |
| Birth Place: | Häädemeeste, Estonia |
| Death Place: | Tallinn, Estonia |
| Party: | Estonian Centre Party |
| Children: | Jüri Ratas |
Rein Ratas (9 May 1938 – 18 April 2022) was an Estonian politician, representing the Estonian Centre Party. Ratas served in the Riigikogu 2007–2011 and again 2015–2018. Due to a lengthy illness, Ratas was substituted by Igor Kravtšenko from December 2016 until September 2018, when Ratas formally left his seat for Kravtšenko.[1]
Ratas is the father of former Estonian Prime Minister Jüri Ratas.