| Type: | commune |
| County: | Alba |
| Poiana Vadului | |
| Leader Name: | Beniamin Toader |
| Leader Party: | PNL |
| Leader Term: | 2020 - 2024 |
| Coordinates: | 46.4°N 75°W |
| Elevation: | 793 |
| Area Total: | 69.05 |
| Population Total: | auto |
| Postal Code: | 517545 |
| Area Code: | (+40) 02 58 |
Poiana Vadului (until 1968 Neagra; Hungarian: Feketevölgy) is a commune located in Alba County, Transylvania, Romania. It has a population of 942 as of 2021, and is composed of eleven villages: Costești, Duduieni, Făgetu de Jos, Făgetu de Sus, Hănășești, Lupăiești, Morcănești, Păștești, Petelei, Poiana Vadului, and Stănești.
The commune is located in the northwestern corner of the county, in the Bihor Mountains; it is a starting point for ascending the Cucurbăta Mare peak, which is, at, the highest peak in the Apuseni Mountains range. Situated in the Țara Moților ethnogeographical region, Poiana Vadului lies at a distance of from Câmpeni and from the county seat, Alba Iulia.