Grange Abbey, Medieval church building in Donaghmede, Ireland.

Grange Abbey is a medieval church ruin in Donaghmede, Dublin, built with a simple rectangular layout and stone walls that remain partially intact. The structure shows features typical of religious buildings from that era, including narrow openings and thick masonry construction.

Diarmuid MacMurrough, King of Leinster, founded the Priory of All Hallows in 1166 and granted the lands of Baldoyle to support it. The chapel is first documented in 1369, when the Lord Deputy of Ireland held a Parliament in the Church of the Grange. In 1539 the Grange of Baldoyle passed to Dublin Corporation; by 1630 the church was reported ruined, with only bare walls remaining.

The name reflects its connection to agricultural land and farming communities in medieval times. Visitors walking around the site can see how the structure was adapted and rebuilt over different periods, showing its long relationship with the local area.

The ruin stands in a green space northeast of a roundabout where the R809 and R139 meet, about 1.25 miles west of Baldoyle village. A path leads to the northern doorway; the southern doorway is blocked. The graveyard is landscaped and no longer visible on the surface.

The chapel's double-arched bell turret is noted in records, though no trace of it survives today. The graveyard around the church is a separate National Monument (DU015-069-002) but is now landscaped and invisible at ground level. Two gravestones stand inside the walls.