Douglas/Rochestown Parish is an extensive suburban parish stretching from Ballincurrig Park on the Douglas Road to the Rochestown Inn on the Rochestown Road with approximately 20,000 living in the area.

The parish was originally joined with Ballygarvan until about 1900 when it became independent. The older of the two parish Churches, St. Columba’s was built in 1814 and was joined by St Patrick’s in Rochestown in 1991.