Saint Mary Church of Saidabad, (Armenian: Սուրբ Աստվածածին Եկեղեցի) is a parish of the Armenian Apostolic Church situated at Saidabad, Cossimbazar near Baharampur in Murshidabad district in the Indian state of West Bengal.

The St. Mary church was built by Khoja Petros Arathoon in 1757–58[2][3] at his own expense in memory of his parents and brothers.

He was at the time the head of the Armenian community in Kolkata.

The cost of the building of it was two lakh and thirty six thousand rupees.

In 2006, it was re-consecrated after a major renovation initiated in 2005 by the Armenian Church community of Kolkata.