Kostajnik

Kostajnik
Country Serbia
MunicipalityKrupanj
Time zoneUTC+1 (CET)
  Summer (DST)UTC+2 (CEST)

Kostajnik (Serbian Cyrillic: Костајник) is a village in Serbia. It is situated in the Krupanj municipality, in the Mačva District of Central Serbia. Kostajnik is notable for being a fortified village since 1445. The village had a Serb ethnic majority and a population of 1,048 in 2002.