| Type: | commune |
| County: | Alba |
| Pianu | |
| Leader Name: | Marin-Ioan Petruse[1] |
| Leader Party: | PNL |
| Term: | 2020 - 2024 |
| Coordinates: | 45.9333°N 52°W |
| Elevation: | 319 |
| Area Total: | 115 |
| Population Total: | auto |
| Postal Code: | 517535 |
| Area Code: | (+40) 02 58 |
Pianu (German: Pien) is a commune located in Alba County, Transylvania, Romania. It has a population of 3,375 in 2021 and is composed of five villages: Pianu de Jos, Pianu de Sus (the commune center), Plaiuri, Purcăreți and Strungari.
The commune is situated in the southwestern part of Alba County, some south of the county seat, Alba Iulia. It is traversed from south to north (first through Pianu de Sus and then Pianu de Jos) by the Pianul river.[2]
There are traces in Pianu of settlements dating back to the Roman period, when the 13th Twin Legion had encampments in the area. The commune was first attested in the 12th century; Pianu de Sus was attested in a deed registered in 1454 in Sibiu.
| In German | In Hungarian | ||
|---|---|---|---|
| Pianu de Jos | Deutsch Pien | Alsópián | |
| Pianu de Sus | Rumänisch Pien | Felsőpián | |
| Plaiuri | Plaintelep | ||
| Purcăreți | Sebespurkerec | ||
| Strungari | Sztrugár |