Saterland Frisian, also known as Sater Frisian, Saterfrisian or Saterlandic, spoken in the Saterland municipality of Lower Saxony in Germany, is the last living dialect of the East Frisian language. It is closely related to the other Frisian languages: North Frisian, spoken in Germany as well, and West Frisian, spoken in the Dutch province of Friesland.

Lower Saxony is a German state in northwestern Germany. It is the second-largest state by land area, with 47,614 km2 (18,384 sq mi), and fourth-largest in population among the 16 Länder federated as the Federal Republic of Germany. In rural areas, Northern Low Saxon and Saterland Frisian are still spoken, albeit in declining numbers.