| Type: | commune |
| County: | Brăila |
| Berteștii de Jos | |
| Leader Name: | Costel Florinel Capbun |
| Leader Party: | PNL |
| Leader Term: | 2020 - 2024 |
| Coordinates: | 44.8333°N 72°W |
| Elevation: | 8 |
| Area Total: | 135.09 |
| Population Total: | auto |
| Postal Code: | 817010 |
| Area Code: | +40 x39 |
Berteștii de Jos is a commune located in Brăila County, Muntenia, Romania. It is composed of four villages: Berteștii de Jos, Berteștii de Sus, Gura Călmățui and Spiru Haret. It formerly included Gura Gârluței and Nicolești villages, now depopulated.
The Balta Mică a Brăilei Natural Park is partly situated on the administrative territory of the commune.