Avdankasy (; , Avtankassi) is a rural locality (a village) in Shatmaposinskoye Rural Settlement of Morgaushsky District, Chuvashia, Russia. The population was 180 as of 2012.Численность населения районов Чувашской Республики There are 5 streets.
Geography Avdankasy is located 16 km southeast of Morgaushi (the district's administrative centre) by road. Shatmaposi is the nearest rural locality.Расстояние от Авданкас до Моргауши
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