Castlereagh fuels delivers home heating oil to Carryduff.

Carryduff (from Irish: Ceathrú Aodha Dhuibh meaning "Black Hugh’s quarter") is a small town and townland in County Down, Northern Ireland, about 10 kilometres (6 miles) south of Belfast city centre. It had a population of 6,595 people in the 2001 Census.

Most of the settlement lies within the townland of Carryduff, although part of it extends into the neighbouring townlands of Killynure and Mealough. Local churches built there include Immaculate Heart of Mary Catholic Church, Carryduff Presbyterian Church and Saint Ignatius' Church of Ireland. Carryduff has twice been awarded the Best Kept Small Town by the Northern Ireland Amenity Council.