| Onur Atasayar | |
| Fullname: | Onur Atasayar |
| Birth Date: | 1 January 1995 |
| Birth Place: | Tavşanlı, Turkey |
| Height: | 1.84m |
| Position: | Left-back |
| Currentclub: | Kocaelispor |
| Clubnumber: | 3 |
| Youthyears1: | 2005–2008 |
| Youthclubs1: | Gölbaşı Belediye Spor |
| Youthyears2: | 2008–2013 |
| Youthclubs2: | Ankaragücü |
| Years1: | 2013–2017 |
| Clubs1: | Ankaragücü |
| Caps1: | 65 |
| Goals1: | 4 |
| Years2: | 2017–2022 |
| Clubs2: | Bursaspor |
| Caps2: | 86 |
| Goals2: | 5 |
| Years3: | 2022–2023 |
| Clubs3: | Ümraniyespor |
| Caps3: | 18 |
| Goals3: | 0 |
| Years4: | 2023– |
| Clubs4: | Kocaelispor |
| Caps4: | 3 |
| Goals4: | 0 |
| Nationalyears1: | 2014 |
| Nationalteam1: | Turkey U19 |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 0 |
| Nationalyears2: | 2015 |
| Nationalteam2: | Turkey U20 |
| Nationalcaps2: | 2 |
| Nationalgoals2: | 0 |
| Club-Update: | 15:44, 11 September 2023 (UTC) |
| Nationalteam-Update: | 10 June 2017 |
Onur Atasayar (born 1 January 1995 in Tavşanlı, Turkey) is a Turkish footballer who plays as a left-back for Kocaelispor.
Onur made his footballing debut in the TFF First League for Ankaragücü in a 1-0 loss to İstanbul Güngörenspor on 8 September 2013.[1] Onur transferred to Bursaspor in January 2017,[2] making his professional debut on 17 February 2017.[3] On 20 July 2022 after 5 seasons with Bursaspor, he transferred to Ümraniyespor signing a 1+1 year contract.[4]
Onur is a youth international for the Turkey, having played for the Turkey U19s and U20s.[5]