Aydemir

right|thumb|The Old Believer [[Lipovan Russian church in Tataritsa, Aydemir]] right|frame|Location of Aydemir in Bulgaria Aydemir (, also Aidemir, Ajdemir) is a village in northeastern Bulgaria, part of Silistra Municipality, Silistra Province. Aydemir had 5711 inhabitants in 2016, down from 9095 short after the fall of communism in 1992. It is the second most populous village in Bulgaria: the village of Lozen took the lead as its population grew to 6252 people while Aydemir lost many inhabitants in the same period. Aydemir lies at, 31 m above sea level. The village is located in the valley of the Danube, 3 km south of the river and 8 km west of Silistra, on the road from Silistra to Rousse. The mayor is Rumen Angelov.

Aydemir is divided into three parts: the centre, the quarter of Delenkite, and the quarter of Tataritsa, which was founded in 1674 by Old Believer Nekrasov Cossacks (see Russians in Bulgaria) at a location prior to that inhabited by Tatars. Tataritsa is now one of the only two Lipovan villages in Bulgaria, the other being Kazashko.