St Mary's Church is in the village of Long Crichel, Dorset, England.

The plan consists of a nave, an apsidal chancel, north and south transepts, and a west tower.

[4] It is in two stages, with diagonal buttresses on the west corners, and a stair turret to the north.

In its lower stage is a three-light west window and a south doorway with a gabled porch inscribed with a bishop's mitre.

The chancel has buttresses rising to crocketed pinnacles, an openwork parapet, and single-light windows.