| Märt Tammearu | |
| Nationality: | Estonian |
| Birth Date: | 2001 3, df=yes |
| Height: | 198 cm |
| Position: | Outside hitter |
| Currentnumber: | 11 |
| Currentclub: |  VC Barkom-Kazhany |
| Years: | 2016–2018 2018–2021 2021–2023 2023–2024 2024– |
| Clubs: |  Pärnu VK Bigbank Tartu Knack Roeselare Tours VB VC Barkom-Kazhany |
| Nationalyears: | 2019– |
Märt Tammearu (born 17 March 2001) is an Estonian volleyball player.[1] He is a member of the Estonian national team[2] and represented his country at the 2021 and 2023 European Volleyball Championships.