| Sagter Ems | |
| Mouth Coordinates: | 53.1778°N 7.6718°W |
| Subdivision Type1: | Country |
| Subdivision Type2: | State |
Sagter Ems is a river of Lower Saxony, Germany. It is formed at the confluence of the rivers Ohe and Marka west of Friesoythe. It is 28 km long.[1] At its confluence with the Dreyschloot (a branch of the Soeste), the river Leda is formed. The Sagter Ems is known as the Leda in East Frisia.
The Sagter Ems is affected by the tide along the portion of its course up to Strücklingen.[2]