| En Name: | Ust-Donetsky |
| Ru Name: | Усть-Донецкий |
| Map Label Position: | bottom |
| Federal Subject: | Rostov Oblast |
| Adm District Jur: | Ust-Donetsky District |
| Inhabloc Cat: | Urban-type settlement |
| Pop 2010Census: | 11817 |
Ust-Donetsky (Russian: Усть-Донецкий) is an urban locality (an urban-type settlement) in Ust-Donetsky District of Rostov Oblast, Russia. Population: