It is located just to the north of the village of St Athan, south of Flemingston and northeast of Llantwit Major.

[1] Greenlands and St Mary Church lie to the north by road from Eglwys Brewis.

The village consists primarily of residential estates which were originally built in the mid-20th century for service families stationed at nearby RAF St Athan.

A Topographical Dictionary of The Dominion of Wales (1811) by Nicholas Carlisle said: "EGLWYS BREWIS, in the Cwmwd of Maenor Glynn Ogwr, Cantref of Cron Nedd (now called the Hundred of Ogmore), County of GLAMORGAN, South Wales: a discharged Rectory, valued in the King's Books at £3..18..6 1/2: Patron, The Rev.

However, only half of Eglwys Brewis is within the St Athan ward as part of the Vale of Glamorgan county council.

[4] It contains a square stone castellated bell-cot at the western end of the nave and a Norman tub font and inscriptions.