FLINT or FLINTSHIRE (Sir Gallestr), a county of north Wale3, the smallest in Wales, bounded north by the Irish sea and the Dee estuary, north-east by the Dee, east by Cheshire, and south-west by Denbighshire. Area, 163,707 acres. Pop. (1931), 112,849. Included in Flint is the detached hundred of Maelor, lying 8 m. S.E. of the main part of the county, and shut in by Cheshire on the north and north-east, by Shropshire on the south, and by Denbighshire on the west and north-west. Structurally the county is dominated by the Clwydian hills running south-south east to north-north-west. Their western slope to the Vale of Clwyd is steep but the eastern slope over much of the county to the Vale of Dee is less sharp. The Clwydian hills are an uplift with a Silurian axis and with younger rocks outcropping on either side. Their highest point is Moel Fammau (1,82o ft.) on the Flintshire Denbighshire boundary.
The Silurian strata of the Clwydian hills, mostly of Wenlock age, pass under the Triassic (Bunter) red beds in the Vale of Clwyd. On the eastern flank of the anticlinal axis the Silurian is overlain by Carboniferous rocks,with Triassic deposits eastward in Cheshire. Both for their influence on the physical features and for their economic value they are the most important rocks in the county. A band of Carboniferous limestone passes from Prestatyn on the coast, close by Holywell and through Caerwen : it forms the Halkin mountain (943 ft.) east of Halkin, whence it continues past Mold to beyond the county boundary. Above these beds come the Holywell shales, possibly equivalent to the Pendleside series of Lancashire and Derbyshire, while upon them lies the Gwespyr sandstone. Farther to 'the east the coal measures extend from Talacre through Flint, Northop, Hawarden and Broughton to Hope. The Carboniferous rocks appear again through the interven tion of a fault in the neighbourhood of St. Asaph. The Carbon iferous mass of the Halkin mountains is separated from the Clwydian hills on the west by the valley of the Alyn and the small tributary of the Clwyd.
The Alyn enters the county near Moel Fammau and passes Cilcen and Mold with a section of underground drainage in the Carboniferous limestone near Hesb-Alyn (the drying-up of Alyn), and bends south to Caergwrle, re-enters Denbighshire and joins the Dee. The latter river enters Flintshire near Overton and divides Maelor from Denbigh on the west, then passes Chester and forms the eastern boundary of the county on the north-east. It enters the Irish sea by means of a wide but shallow estuary. The north-eastern part of Flintshire is a low-lying country border ing the Dee Estuary. The low ground extends westwards to the mouth of the Clwyd valley. This has been one of the great "ways" into Wales for many centuries. Short stretches of blown sand occur on the north coast near Rhyl and Talacre.
Soon after the arrival of the Normans much of the county, par ticularly the part to the east of Offa's dyke, came under the control of the lordship of Chester.
The centres of conti,;l were Hawarden and Rhuddlan where motte and bailey castles were built. It is, however, important to note that the early Norman penetration was confined to the low lands, while the upland regions remained in the hands of the Welsh chieftains. So strong did the native power become that in the hands of Owain Gwynedd (1135-7o) and his grandson Llewellyn op Iowerth (1198-1240), Welsh influence was dominant in the county. It was with the building of the stone castles of Hawarden, Hope and Mold, in the middle of the 13th century, that Norman influence gained a stronger foothold, while the interesting castle of Ewloe shows a Welsh construction on a Norman model. The final conquest was achieved with the establishment of the great Edwardian fortresses of Rhuddlan and Flint, in 1277, and the town of Flint was definitely planned at the time. Maelor Saesneg was incorporated in the county in 1284. The county contains two mediaeval religious houses—Basingwerk abbey near Holywell, a Cistercian house founded in 1131 or 1132, and the ruins (now incorporated in a farm) of the Dominican friary of Rhuddlan, founded in the 13th century.
The county had associations with England during the Renais sance, and Dr. Morgan, bishop of St. Asaph (1602-04) directed the translation of the Bible into Welsh. Many of the castles were held for the king during the Civil War of the 17th century, but they soon fell into the hands of the parliament and were "slighted." The rise of the great religious denominations in the and i9th centuries caused a profound change in the social life of Wales. Flintshire, as a border county, had early associa tions with Puritanism and the Independents were strong in the 19th century. The Calvinistic Methodism of the highlands of Denbighshire was not so marked in Flintshire, though the western section of the county was much affected. The county has retained, in certain regions that still remained under the influence of some ancient landed families, a measure of adherence to the Roman Catholic Church.
The mineral wealth of the county seems to have been known from early times. The location of metal mines in Halkin moun tain seems to bear some relation to the Romano-British hill-top camps and the Roman trackways, while the mines were of un doubted importance at the time of King Offa. In the 18th and 19th centuries large numbers of Cornish miners settled in the neighbourhood, leaving their trace in many of the present family names. Halkin mountain was a great lead-mining district. Lead is also raised at Mold, Holywell, Prestatyn and Talacre. Zinc, f or merly only worked at Dyserth, has increased in output. Copper is also raised at Talargoch. The exploitation of the coalfield during the latter half of the i9th century transformed the eastern half of the county. The collieries began at Llanasa, then run through Whitford, Holywell, Flint, Halkin, Northop, Buckley, Prestatyn and Hawarden (Penarlag) . The use of the coal led to the extension of the local smelting of the iron and lead ore of the district, and from these occupations important chemical works have grown up at Flint and along the north coast of the county. Alkali works are most important. The limestone is also worked, and there are some coarse-clay potteries. The presence of the coal and the chemical industries, and expanses of relatively cheap sandy soil on the north coast, the whole being in close proximity to the Lan cashire textile industries, has made the neighbourhood of Connah's Quay the site of important factories in the artificial silk industry. Rhyl on the north coast is a seaside resort.