Surname Gromadskii (Gromadskii 
, Громадский 
) , in all the world, is a rare family name. The last name Gromadskii is characteristic of Belarus, where it is a rare surname, Russia, and Estonia. Not in comparison with a country's population, the name is most common in Russia, Belarus, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Gromadskii | Russia, Estonia |
| Громадский | Kazakhstan, Russia, Ukraine, Belarus |