Kilgwrrwg (Welsh: Cilgwrrwg) is a rural parish in Monmouthshire, south east Wales, United Kingdom. It is located seven miles north west of Chepstow and seven miles south east of Usk in a network of country lanes running through the rolling hills below the Trellech ridge.
Holy Cross Church at Kilgwrrwg is one of the most remote parish churches in the UK still in regular use. It can only be reached by crossing two fields and a stream from the nearest house. It is surrounded by a circular churchyard suggesting a Celtic foundation, and the church building contains some Early English architectural features, although it was restored in the 19th century.[1] The small hamlet of Kilgwrrwg Common is located about one mile from the church.