Derriaghy, (/ˌdɛrɪˈæxi/;^[1] also known as Derryaghy), (from Irish Doire Achaidh, meaning 'oak-wood of the field'), is a townland (of 538 acres) and civil parish in County Antrim, Northern Ireland, 5.5 miles (9 km) south-west of Belfast city centre.^[2] The townland is situated in the historic barony of Belfast Upper and the civil parish covers areas of both Belfast Upper and the barony of Massereene Upper.^[3]

The listed Church of Ireland building Christ Church in Derriaghy occupies the site of an early church.^[2] The earliest documentary reference to a church in Derriaghy is in a letter from Pope Innocent III in 1204. The Taxation of Down, Connor and Dromore of 1306-07 also mentions a church in Derriaghy. The records of an Inquisition in Antrim in 1605 indicate that the parish church of Dirreraghie was in some disrepair.^[4]

• Christ Church, Church of Ireland listed building
• Derriaghy Gospel Hall
• St. Patrick's Roman Catholic Church

Derriaghy railway station was opened in 1907 and is between Dunmurry and Lambeg stations on the main Belfast-Dublin railway line.

• Derriaghy Cricket Club, founded in 1920 and plays in the NCU Senior League
• Derriaghy Cricket Club F.C., football club founded in 1982 that plays in the Northern Amateur Football League
• Éire Óg Derriaghy GAC, GAA club founded in 1932 that draws its membership from Derriaghy, Finaghy and Dunmurry

• Henrietta Gayer (1700s – 25 March 1814), early Methodist leader who had John Wesley and other preachers stay at her house^[5]
• Cosslett Ó Cuinn (1907 – 1995), Church of Ireland minister and poet, theologian, critic and biblical scholar who translated the New Testament into Irish, born in Derriaghy
• Philip Skelton (1707 – 1787), Protestant clergyman and writer, born in Derriaghy

• List of townlands of County Antrim
• List of civil parishes of County Antrim