Derrymacash Irish: Doire Mhic Cais The Cash
Location within Northern Ireland
Population	629 (2001)
Irish grid reference	J035601
• Belfast	25 mi (40 km)
• Dublin	78 mi (126 km)
District	Armagh City, Banbridge and Craigavon
County	County Armagh
Country	Northern Ireland
Sovereign state	United Kingdom
Post town	CRAIGAVON
Postcode district	BT66
Dialling code	028
Police	Northern Ireland
Fire	Northern Ireland
Ambulance	Northern Ireland
UK Parliament	Upper Bann
NI Assembly	Upper Bann
List of places UK Northern Ireland Armagh 54°28′44″N 6°24′11″W / 54.479°N 6.403°W / 54.479; -6.403

Derrymacash (from Irish Doire Mhic Cais, meaning 'Oakgrove of MacCash')^[1] is a small village and townland in County Armagh, Northern Ireland. It is about four miles west of Lurgan, between the M1 motorway and Lough Neagh. It had a population of 629 in the 2001 census.^[2]

A Catholic church and primary school (both called St Patrick's) are in neighbouring Aghacommon. Many people mistake the townlands of Derrymacash and Aghacommon. Derrymacash starts after one crosses the Closet River, just beyond the M1 bridge, heading towards Lough Neagh.

Near Derrymacash is the nature reserve Oxford Island, which is known for its nature trails, bogland, bird hides and species of wildlife.^{[citation needed]}

The main sports in Derrymacash are Gaelic football and camogie, represented by the Wolfe Tone GAC and St Enda's GAA clubs. Both play their home games in Páirc na Ropairí.^{[citation needed]}