| Joona Tiainen | |
| Birth Date: | 7 May 2000 |
| Position: | Goalkeeper |
| Currentclub: | JäPS |
| Clubnumber: | 31 |
| Years1: | 2017–2022 |
| Clubs1: | Lahti |
| Caps1: | 21 |
| Goals1: | 0 |
| Years2: | 2017 |
| Clubs2: | → Kuusysi |
| Caps2: | 3 |
| Goals2: | 0 |
| Years3: | 2018 |
| Clubs3: | → Espoo (loan) |
| Caps3: | 5 |
| Goals3: | 0 |
| Years4: | 2019 |
| Clubs4: | → Espoo (loan) |
| Caps4: | 2 |
| Goals4: | 0 |
| Years5: | 2020–2022 |
| Clubs5: | → Reipas Lahti |
| Caps5: | 16 |
| Goals5: | 0 |
| Years6: | 2023 |
| Clubs6: | HIFK |
| Caps6: | 25 |
| Goals6: | 0 |
| Years7: | 2024– |
| Clubs7: | JäPS |
| Caps7: | 17 |
| Goals7: | 0 |
| Club-Update: | 26 October 2024 |
Joona Tiainen (born 7 May 2000) is a Finnish professional footballer who plays for Ykkösliiga club Järvenpään Palloseura (JäPS) as a goalkeeper.
On 28 December 2022, Tiainen signed a one-year contract with HIFK.[1]