| Ondřej Petrák | |
| Fullname: | Ondřej Petrák |
| Birth Date: | 1992 3, df=yes |
| Birth Place: | Prague, Czechoslovakia |
| Height: | 1.86 m |
| Position: | Midfielder |
| Currentclub: | Bohemians 1905 |
| Clubnumber: | 31 |
| Youthyears1: | 1999–2000 |
| Youthclubs1: | Olympie Dolní Břežany |
| Youthyears2: | 2000–2001 |
| Youthclubs2: | ABC Braník |
| Youthyears3: | 2001–2002 |
| Youthclubs3: | Bohemians 1905 |
| Youthyears4: | 2002–2010 |
| Youthclubs4: | Slavia Prague |
| Years1: | 2010–2013 |
| Clubs1: | Slavia Prague |
| Caps1: | 62 |
| Goals1: | 2 |
| Years2: | 2014–2020 |
| Clubs2: | 1. FC Nürnberg |
| Caps2: | 129 |
| Goals2: | 3 |
| Years3: | 2020 |
| Clubs3: | → Dynamo Dresden (loan) |
| Caps3: | 13 |
| Goals3: | 0 |
| Years4: | 2020–2021 |
| Clubs4: | Slovan Bratislava |
| Caps4: | 3 |
| Goals4: | 0 |
| Years5: | 2020–2021 |
| Caps5: | 15 |
| Goals5: | 2 |
| Years6: | 2022– |
| Clubs6: | Bohemians 1905 |
| Caps6: | 27 |
| Goals6: | 3 |
| Club-Update: | 12 June 2024 |
| Nationalyears1: | 2008 |
| Nationalteam1: | Czech Republic U16 |
| Nationalcaps1: | 6 |
| Nationalgoals1: | 0 |
| Nationalyears2: | 2008 |
| Nationalcaps2: | 6 |
| Nationalgoals2: | 0 |
| Nationalyears3: | 2010 |
| Nationalteam3: | Czech Republic U18 |
| Nationalcaps3: | 4 |
| Nationalgoals3: | 0 |
| Nationalyears4: | 2012 |
| Nationalteam4: | Czech Republic U20 |
| Nationalcaps4: | 1 |
| Nationalgoals4: | 0 |
| Nationalyears5: | 2012–2015 |
| Nationalteam5: | Czech Republic U21 |
| Nationalcaps5: | 12 |
| Nationalgoals5: | 1 |
Ondřej Petrák (born 11 March 1992) is a Czech professional footballer who is currently signed to Bohemians Praha in the Fortuna Liga. He represented the Czech Republic at under-21 level and spent several seasons playing in Germany.
On 24 July 2020, Slovan Bratislava have announced signing of a three-year deal with Petrák. He was set to replace departing Marin Ljubičić and fill-in for Filip Lichý, who suffered a serious injury in previous months. He was recommended by former Slovak international Marek Mintál, managing in Nürnberg's structures.[1]