Merionethshire 's one of thirteen historic counties of Wales, and a former administrative county. The administrative county of Merioneth, created under the Local Government Act 1888, was abolished under the Local Government Act 1972 on April 1, 1974. The bulk formed the Meirionnydd district in the new county of Gwynedd, with a small protusion in the north-east (the Edeyrnion Rural District) becoming part of the Glyndŵr district of Clwyd. Since Local Government (Wales) Act 1994 came into fo… (More on Merioneth)