Annaghmare Court Tomb, also known as The Black Castle, is a chamber tomb located near to the town of Crossmaglen in County Armagh, Northern Ireland. It is one of many megalithic tombs on the island of Ireland.

Annaghmare Court Tomb is situated 1.73 miles (2.78 km) north-west of the town of Crossmaglen.

The site was excavated in 1963–4, with many of its features preserved in situ. It is thus regarded as "one of the best preserved examples of its type", as other court tombs in Ireland were damaged during the course of their excavations.

The forecourt of the tomb is horse-shoe shapes and features several large stones up to 1.9m high. The spaces between were filled with dry stone walling.

The tourist information website visitmournemountains.co.uk notes that the "most unusual feature of the forecourt, however, is a small standing stone to the south-east of the centre".

There is an information board onsite.