| P | # | Player | Born | Height | Weight | Contract | |
|---|---|---|---|---|---|---|---|
| GK | 1 | Philipp Heerwagen | 1983-04-13 | 193 | 2017-06-30 | ||
| GK | 30 | Robin Himmelmann | 1989-02-05 | 187 | 2017-06-30 | ||
| GK | 33 | Svend Brodersen | 1997-03-22 | 188 | 2017-06-30 | ||
| D | 15 | Daniel Buballa | 1990-05-11 | 187 | 2017-06-30 | ||
| D | 19 | Jacob Rasmussen | 1997-05-28 | 190 | 2020-06-30 | ||
| D | 27 | Jan-Philipp Kalla | 1986-08-06 | 182 | 2018-06-30 | ||
| D | 5 | Joël Keller | 1995-03-06 | 179 | 2018-06-30 | ||
| D | 3 | Lasse Sobiech | 1991-01-18 | 196 | 74 | 2017-06-30 | |
| D | 16 | Marc Hornschuh | 1991-03-02 | 188 | 73 | 2020-06-30 | |
| D | 4 | Philipp Ziereis | 1993-03-14 | 189 | 2019-09-30 | ||
| D | 26 | Sören GontherC | 1986-12-15 | 186 | 2017-06-30 | ||
| D | 2 | Vegar Hedenstad | 1991-06-21 | 178 | 74 | 2019-06-30 | |
| M | 7 | Bernd Nehrig | 1986-09-28 | 180 | 79 | 2017-06-30 | |
| M | 10 | Christopher Buchtmann | 1992-04-25 | 175 | 68 | 2019-06-30 | |
| M | 6 | Christopher Avevor | 1992-02-11 | 184 | 81 | 2019-06-30 | |
| M | 25 | Dennis Rosin | 1996-06-27 | 185 | - | 2017-06-30 | |
| M | 8 | Jeremy Dudziak | 1995-08-28 | 174 | 73 | 2018-06-30 | |
| M | 31 | Maurice Litka | 1996-01-02 | 178 | - | 2018-06-30 | |
| M | 20 | Richard Neudecker | 1996-10-29 | 174 | - | 2019-06-30 | |
| M | 28 | Waldemar Sobota | 1987-05-19 | 175 | 60 | 2018-06-30 | |
| F | 11 | Aziz Bouhaddouz | 1987-03-30 | 188 | 81 | 2019-06-30 | |
| F | 9 | Fafá Picault | 1991-02-23 | 173 | 2018-06-30 | ||
| F | 37 | Kyoung-Rok Choi | 1995-03-15 | 176 | - | 2019-06-30 | |
| F | 34 | Marvin Ducksch | 1994-03-07 | 188 | 79 | 2018-06-30 | |
| F | 24 | Nico Empen | 1996-01-11 | 179 | - | 2018-06-30 | |
| F | 13 | Ryo Miyaichi | 1992-12-14 | 183 | 70 | 2018-06-30 |
| Date | Player | From | To | Status | Src |
|---|---|---|---|---|---|
| 30.Jun | Enver Cenk Sahin (M) | FC St. Pauli | Medipol Basaksehir F.K. | Confirmed | |
| 3.Sep | Davidson Drobo-Ampem (D) | FC St. Pauli | Hobro IK | Confirmed | |
| 26.Jul | Enver Cenk Sahin (M) | Medipol Basaksehir F.K. | FC St. Pauli | Confirmed | |
| 27.Jun | Jacob Rasmussen (D) | FC Schalke 04 | FC St. Pauli | Confirmed | |
| 15.Jun | Marvin Ducksch (F) | Borussia Dortmund | FC St. Pauli | Confirmed | |
| 11.Jun | Marc Rzatkowski (M) | FC St. Pauli | FC Red Bull Salzburg | Confirmed | |
| 18.Jan | Lennart Thy (F) | FC St. Pauli | SV Werder Bremen | Confirmed | |
| 29.Aug | Jeremy Dudziak (M) | Borussia Dortmund | FC St. Pauli | Confirmed | |
| 18.Jun | Ryo Miyaichi (F) | Arsenal FC | FC St. Pauli | Confirmed | |
| 21.Jan | Waldemar Sobota (M) | Club Brugge K.V. | FC St. Pauli | Confirmed |