Ehrmantraut County is one of the five counties of Carraway Island (the other four being Barrymore, Lewis, Vassaras, and Walsh). The county is located in the northeastern corner of the island.
The county seat is Adustelan, which also serves as the nation's capital.
With a population of 2,495,801 as of the 2019 census, it is by far the most populous county on Carraway Island.