| Jan Gadomski | |
| Birth Date: | 24 June 1889 |
| Birth Place: | Czatkowice, Lesser Poland Voivodeship, Russian Poland |
| Death Date: | 2 January 1966 |
| Nationality: | Polish |
| Occupation: | Astronomer |
Jan Gadomski (24 June 1889, in Czatkowice, Lesser Poland Voivodeship, Russian Poland – 2 January 1966) was a Polish astronomer.
At the Jagiellonian University Observatory he made systematic observations of eclipsing binary stars. The crater Gadomski on the Moon is named after him.