| Jirnov | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Argeș, Dâmbovița, Teleorman |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Glogoveanu, Sârbeni, Udeni, Gratia |
| Length: | 43km (27miles) |
| Mouth: | Dâmbovnic |
| Mouth Location: | Ciurari-Deal |
| Mouth Coordinates: | 44.4333°N 25.4396°W |
| Basin Size: | 90km2 |
The Jirnov is a left tributary of the river Dâmbovnic in Romania.[1] Its length is 43km (27miles) and its basin size is 90km2.[2] It flows into the Dâmbovnic in Gratia.[3]