thumb|Location of Ems-Oriental in France (1812)
Ems-Oriental (, "Eastern Ems"; , ) was a department of the First French Empire in present-day Germany. It was formed in 1810, when the Kingdom of Holland was annexed by France. Its territory is part of the present-day German region of East Frisia in Lower Saxony. Its capital was Aurich. The department was subdivided into the following arrondissements and cantons (situation in 1812):
- Aurich, cantons: Aurich, Berum, Norden and Timmel.
- Emden, cantons: Emden, Leer, Oldersum, Pewsum and Stickhausen.
- Jever, cantons: Esens, Hooksiel, Jever, Rüstringen and Wittmund.
Its population in 1812 was 128,200.