Kostajnik () 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.
Historical population
1948: 1,431 1953: 1,621 1961: 1,671 1971: 1,506 1981: 1,364 1991: 1,264 2002: 1,048In Serbian Књига 9, Становништво, упоредни преглед броја становника 1948, 1953, 1961, 1971, 1981, 1991, 2002, подаци по насељима, Републички завод за статистику, Београд, мај 2004,
See also List of places in Serbia
References
External links Kostajnik Official