| Type: | commune |
| County: | Galați |
| Cosmești | |
| Leader Name: | Ion Tuchiluș |
| Leader Party: | PSD |
| Leader Term: | 2020 - 2024 |
| Coordinates: | 45.8694°N 27.3108°W |
| Elevation: | 81 |
| Area Total: | 49.89 |
| Population Total: | auto |
| Postal Code: | 807085 |
Cosmești is a commune in Galați County, Western Moldavia, Romania with a population of 5,196 people. It is composed of six villages: Băltăreți, Cosmești, Cosmeștii-Vale, Furcenii Noi, Furcenii Vechi, and Satu Nou.
The commune lies on the Moldavian Plateau, on the banks of the Siret River. It is located in the western part of the county, on the border with Vrancea County.