| Type: | commune |
| County: | Bacău |
| Mărgineni | |
| Leader Name: | Marcelin Șolot |
| Leader Party: | PSD |
| Leader Term: | 2020 - 2024 |
| Coordinates: | 46.5833°N 76°W |
| Elevation: | 194 |
| Area Total: | 83.48 |
| Population Total: | auto |
| Postal Code: | 607315 |
| Area Code: | +(40) 234 |
Mărgineni (Hungarian: Marzsinén) is a commune in Bacău County, Western Moldavia, Romania. It is composed of eight villages: Barați (Barát), Luncani (Lunkány), Mărgineni, Pădureni, Podiș, Poiana, Trebeș (Terebes), and Valea Budului.
At the 2002 census, the commune had 8,132 inhabitants, 99.8% of which were ethnic Romanians; 57.5% were Roman Catholic and 41.9% Romanian Orthodox. At the 2011 census, the population had decreased to 7,993, while at the 2021 census, it had increased to 9,594.[1]