The Friesenfeld was a Gau (territory), in modern-day north Thuringia and south Saxony-Anhalt in the area between Allstedt and Merseburg and which bordered Hassegau. Numerous places in Friesenfeld such as Erdeborn were named in the Hersfeld Tithe Register of the Hersfeld Abbey as being obliged to pay tithes.
The territory was named after Frisians who settled the area as colonists.