| Country: | Germany |
| Weight Class: | +72 kg, +78 kg |
| Worlds Rank: | 1 |
| Worlds Year: | 1993 |
| Regionals Type: | EU |
| Regionals Rank: | 1 |
| Regionals Year: | 1997 |
| Regionals Weight: | Women's +72 kg |
| Olympics Rank: | 3 |
| Olympics Year: | 1996 |
| Olympics Weight: | Women's +72 kg |
| Updated: | 4 June 2023 |
Johanna Hagn (born 27 January 1973 in Wolfratshausen, Upper Bavaria) is a German judoka.
She won a bronze medal in the heavyweight (+72 kg) division at the 1996 Summer Olympics.