| Type: | commune |
| County: | Ialomița |
| Cosâmbești | |
| Leader Name: | Bogdan Popescu |
| Leader Party: | PSD |
| Leader Term: | 2020 - 2024 |
| Coordinates: | 44.5667°N 53°W |
| Elevation: | 22 |
| Area Total: | 42.18 |
| Population Total: | auto |
| Postal Code: | 927090 |
| Area Code: | +(40) 243 |
Cosâmbești is a commune located in Ialomița County, Muntenia, Romania. It is composed of two villages, Cosâmbești and Gimbășani. It also included the village of Mărculești until 2005, when this was split off to form Mărculești Commune.