| Type: | commune |
| County: | Ialomița |
| Ciulnița | |
| Leader Name: | Stelică Gheorghe[1] |
| Leader Party: | ALDE |
| Leader Term: | 2020 - 2024 |
| Coordinates: | 44.5333°N 48°W |
| Elevation: | 54 |
| Area Total: | 68.46 |
| Population Total: | auto |
| Postal Code: | 927080 |
| Area Code: | +(40) 243 |
Ciulnița is a commune located in Ialomița County, Muntenia, Romania. It is composed of four villages: Ciulnița, Ion Ghica, Ivănești, and Poiana.
The commune is located in the south-central part of the county, on the border with Călărași County. It lies on the right bank of the Ialomița River, just south of the county seat, Slobozia, and east of Bucharest.
Ciulnița is crossed by county road DJ201, which connects it to the west to Albești, Axintele, and Coșereni (where it ends in national road DN2) and to the east to Slobozia, Mărculești, and Țăndărei (where it ends in). The Ciulnița train station serves the CFR Main Line 800, which connects Bucharest with the Black Sea coast.