Lenzburg is a town in Switzerland. The term may also refer to:
Switzerland Lenzburg (district), a district of the Canton of Aargau, of which Lenzburg is the capital Schloss Lenzburg, a castle above the town of Lenzburg Regionalbus Lenzburg AG, a local bus company
United States Lenzburg, Illinois Lenzburg Township, St. Clair County, Illinois