| Type: | commune |
| County: | Caraș-Severin |
| Leader Name: | Marian Vlasici (Marijan Vlašić)[1] |
| Leader Party: | PNL |
| Term: | 2020 - 2024 |
| Established Date: | 1598 |
| Coordinates: | 45.2833°N 70°W |
| Elevation: | 240 |
| Area Total: | 66.49 |
| Population Total: | auto |
| Postal Code: | 327255 |
| Area Code: | +(40) 255 |
Lupac (Romanian: Lupac; Croatian: Lupak; Hungarian: Kiskrassó) is a commune in Caraș-Severin County, Banat, Romania. It is composed of four villages: Clocotici (Klokotič; Krassócsörgő), Lupac, Rafnic (Ravnik; Kengyeltó), and Vodnic (Vodnik; Vizes).
The commune is situated in the foothills of the Banat Mountains, at an altitude of, on the banks of the river Gelug. It located in the central part of the county, southwest of the county seat, Reșița.
At the 2002 census, the population of Lupac numbered 3,023 people and was mostly made up of Krashovani Croats (93.38%), with a minority of Romanians (5.32%);[2] most of the inhabitants of the commune (95.33%) were Roman Catholic. At the 2011 census, the population had decreased to 2,677; of those, 86.59% were Croats, 7.28% Romanians, and 1.08% Roma. At the 2021 census, the commune had 2,423 inhabitants, of which 86.22% were Croats, 7.92% Romanians, and 1.24% Roma.[3]
The commune is officially bilingual, with both Romanian and Croatian being used as working languages on public signage and in administration, education and justice (see Croats of Romania).
AFC Voința Lupac is a football club based in the commune, currently playing in Liga III, the third tier of the Romanian football league system.