Kaljaja

Kaljaja (Cyrillic: Каљаја) or Kalaja (Albanian) may refer to:


 * Kaljaja (Balovac) is an archaeological site located southeast of the village of Balovac, in municipality of Podujevo
 * Kaljaja (Teneš Do) is an archaeological site, which is located in Teneš Do, in municipality of Pristina
 * Kaljaja (Binačka) is a fortress located near village Podgrađe, near Gjilan
 * Kaljaja (Bistrička) is the medieval fortress in Prizren
 * Kalaja (Ulcinj)