| Type: | commune |
| County: | Alba |
| Ohaba | |
| Leader Name: | Adrian Nicolae Mihălțan |
| Leader Party: | PNL |
| Leader Term: | 2020 - 2024 |
| Coordinates: | 46.0667°N 70°W |
| Elevation: | 352 |
| Area Total: | 40.52 |
| Population Total: | auto |
| Postal Code: | 517530 |
| Area Code: | (+40) 02 58 |
Ohaba (Hungarian: Székásszabadja; German: Neudorf) is a commune located in Alba County, Transylvania, Romania. It is composed of four villages: Colibi (Székás), Măghierat (Magyarádtanya), Ohaba, and Secășel (Szekasbesenyö; Heidendorf).
The commune is located in the eastern part of the county, on the banks of the river Secaș and its left tributary, the Ohaba.
At the 2011 census, the commune had a population of 757; of those, 92.73% were ethnic Romanians and 2.51% Roma. At the 2021 census, the population had dropped to 538, of which 90.15 were ethnic Romanians.