Dėdynai is a village in Šakiai District Municipality, in Marijampolė County, Lithuania. Dėdynai lies at 61 m above sea level. It has 1 inhabitant. The nearest city is Kaunas, 48 km to the east. Among the landmarks around are Panemunė Castle (15.0 km), Christmemel (19.0 km) and Church of the Assumption, Veliuona (8.9 km).