| Type: | commune |
| County: | Maramureș |
| Oarța de Jos | |
| Population Total: | auto |
| Leader Name: | Bogdan Pop[1] |
| Leader Party: | CMM |
| Leader Term: | 2020 - 2024 |
| Coordinates: | 47.45°N 31°W |
| Elevation Min: | 260 |
| Elevation Max: | 280 |
| Area Total: | 31.32 |
Oarța de Jos (Hungarian: Alsóvárca) is a commune in Maramureș County, Crișana, Romania. It is composed of three villages: Oarța de Jos, Oarța de Sus (Felsővárca), and Orțița (Középvárca).
The commune is located in the southwestern part of the county, at a distance of 54km (34miles) from the county seat, Baia Mare, and 20km (10miles) from Cehu Silvaniei. The river Oarța flows through the commune's three villages.