Turku Orthodox Church (Finnish: Turun ortodoksinen kirkko, Swedish: Åbo ortodoxa kyrka) or the Church of the Holy Martyr Empress Alexandra (Finnish: Pyhän marttyyrikeisarinna Aleksandran kirkko; Swedish: Heliga martyrkejsarinnan Aleksandras kyrka; Greek: Ορθόδοξη εκκλησία της Αγίας Αλεξάνδρας, Orthódoxi ekklisía tis Agías Alexándras)[1] is the main church of the Turku Orthodox parish located at the northwest corner of the Turku Market Square along the Yliopistonkatu street in Turku, Finland.

The church was built under plans drafted by architect Carl Ludvig Engel and was ordered by Nicholas I of Russia on 5 January 1838.

The church was dedicated to Alexandra, the spouse of Diocletian who had publicly become Christianised and suffered a martyr's death on 23 April 303.

The choice of patron saint may have been due to Nicholas I's wife's name, Aleksandra Feodorovna.

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