Church of Saint Demetrius or St. Demetrius' Church may refer to:
Albania
- St. Demetrius' Church, Bezmisht
- St. Demetrius' Church, Boboshticë
- St. Demetrius' Church, Drobonik
- St. Demetrius' Church, Poliçan
- St. Demetrius' Monastery Church, Qeparo
Bulgaria
- Church of St Demetrius, Boboshevo
- Church of St Demetrius, Patalenitsa
- Church of St Demetrius of Thessaloniki, Veliko Tarnovo
Romania
Others
- Hagios Demetrios, a World Heritage Site in Thessaloniki, Greece
- Church of Saint Demetrius, Budapest, Hungary
- Church of Saint Demetrius in Kosovska Mitrovica, Kosovo
- St Demetrius Chapel, Għarb, Malta
- Cathedral of Saint Demetrius, Vladimir, Russia
- Cathedral Church of St Andrew and St Demetrius, Madrid, Spain
- St. Demetrios Greek Orthodox Church (Seattle), United States
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