Erlinsbach is a municipality in the district of Aarau of the canton of Aargau in Switzerland. Erlinsbach is first mentioned in 1173 as Arnlesbah. In …Erlinsbach is a municipality in the district of Aarau of the canton of Aargau in Switzerland. Erlinsbach is first mentioned in 1173 as Arnlesbah. In 1220 it was mentioned as Erndespah and in the 14th century it was known as Erlispach.