(230/sq mi) Time zone UTC+01:00 Postal code(s) 2556 SFOS number 5729 Surrounded by Arboldswil, Bennwil, Bubendorf, Hölstein, Lampenberg, Oberdorf, Titterten Website www.niederdorf.ch SFSO statistics Wangen bei Olten at Wikimedia Commons has media related to Aqueduct.