The Parish of St. Mark is located in south-central New Brunswick, near the town of Sussex. It shares an incumbent with the Parish of Waterford. Within the two parishes, there are two church buildings, St. Mark's in Sussex Corner and St. John the Evangelist in Waterford, with weekly services; All Saints in Jeffries Corner with at least a monthly service; and this chapel of ease in Londonderry.
The people are firm in their belief in the Gospel and endeavour to accommodate traditional and contemporary expressions of faith during worship. They also try to keep apprised of and respond to the needs of the communities in which they are placed.