Alaca (Turkish pronunciation: [aɫad͡ʒa]) may refer to the following places in Turkey:

• Alaca, Çorum, a large district in Çorum Province
  • Alaca Dam
• Alaca, Borçka, a village in Artvin Province
• Alaca, Beşiri, a village in Batman Province
• Alaca, Elâzığ, a village in Elâzığ Province
• Alaca, Aydıntepe, a village in Bayburt Province
• Alaca, Kulp, a village in Diyarbakır Province
• Alaca, Aziziye, a neighbourhood in Erzurum Province
• Alaca, Hınıs, a village in Erzurum Province
• Alaca, İnebolu, a village in Kastamonu Province
• Alaca, Köprüköy