Lenzburg District Canton of Aargau Lenzburg District is a district of the Canton of Aargau in Switzerland, lying at the center of the canton. The district capital is the town of Lenzburg. It has a population of 65,707. Past exhibitions (1) Times Under Pressure - Fotofestival Lenzburg from 1 Jan 2020 A group photography exhibition at Fotofestival Lenzburg exploring the tensions and transformations of our time through the lenses of multiple artists.