| Hertsa | |
| Name Other: | Herța |
| Pushpin Map: | Ukraine Chernivtsi Oblast#Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania, Ukraine |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Botoșani County, Chernivtsi Oblast |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Fundu Herții, Hertsa |
| Discharge1 Location: | Border with Ukraine |
| Discharge1 Min: | 0m3/s |
| Discharge1 Max: | 19.75m3/s |
| Mouth: | Prut |
| Mouth Coordinates: | 48.187°N 26.3122°W |
| Tributaries Left: | Maranda |
| Tributaries Right: | Baranca |
The Hertsa or Hertza (Romanian; Moldavian; Moldovan: Herța; Ukrainian: Герца) is a right tributary of the river Prut in Romania and Ukraine. It flows through the town Hertsa, and discharges into the Prut near Marshyntsi. In Romania, its length is 6km (04miles) and its basin size is 23km2.