A complete list of counties in the UK that includes England, Scotland, Wales and Northern Ireland.

<select name="Counties">
  {" "}
  <optgroup label="England">
    {" "}
    <option>Bedfordshire</option> <option>Berkshire</option>{" "}
    <option>Bristol</option> <option>Buckinghamshire</option>{" "}
    <option>Cambridgeshire</option> <option>Cheshire</option>{" "}
    <option>City of London</option> <option>Cornwall</option>{" "}
    <option>Cumbria</option> <option>Derbyshire</option> <option>Devon</option>{" "}
    <option>Dorset</option> <option>Durham</option>{" "}
    <option>East Riding of Yorkshire</option> <option>East Sussex</option>{" "}
    <option>Essex</option> <option>Gloucestershire</option>{" "}
    <option>Greater London</option> <option>Greater Manchester</option>{" "}
    <option>Hampshire</option> <option>Herefordshire</option>{" "}
    <option>Hertfordshire</option> <option>Isle of Wight</option>{" "}
    <option>Kent</option> <option>Lancashire</option>{" "}
    <option>Leicestershire</option> <option>Lincolnshire</option>{" "}
    <option>Merseyside</option> <option>Norfolk</option>{" "}
    <option>North Yorkshire</option> <option>Northamptonshire</option>{" "}
    <option>Northumberland</option> <option>Nottinghamshire</option>{" "}
    <option>Oxfordshire</option> <option>Rutland</option>{" "}
    <option>Shropshire</option> <option>Somerset</option>{" "}
    <option>South Yorkshire</option> <option>Staffordshire</option>{" "}
    <option>Suffolk</option> <option>Surrey</option>{" "}
    <option>Tyne and Wear</option> <option>Warwickshire</option>{" "}
    <option>West Midlands</option> <option>West Sussex</option>{" "}
    <option>West Yorkshire</option> <option>Wiltshire</option>{" "}
    <option>Worcestershire</option>{" "}
  </optgroup>{" "}
  <optgroup label="Scotland">
    {" "}
    <option>Aberdeenshire</option> <option>Angus</option>{" "}
    <option>Argyllshire</option> <option>Ayrshire</option>{" "}
    <option>Banffshire</option> <option>Berwickshire</option>{" "}
    <option>Buteshire</option> <option>Cromartyshire</option>{" "}
    <option>Caithness</option> <option>Clackmannanshire</option>{" "}
    <option>Dumfriesshire</option> <option>Dunbartonshire</option>{" "}
    <option>East Lothian</option> <option>Fife</option>{" "}
    <option>Inverness-shire</option> <option>Kincardineshire</option>{" "}
    <option>Kinross</option> <option>Kirkcudbrightshire</option>{" "}
    <option>Lanarkshire</option> <option>Midlothian</option>{" "}
    <option>Morayshire</option> <option>Nairnshire</option>{" "}
    <option>Orkney</option> <option>Peeblesshire</option>{" "}
    <option>Perthshire</option> <option>Renfrewshire</option>{" "}
    <option>Ross-shire</option> <option>Roxburghshire</option>{" "}
    <option>Selkirkshire</option> <option>Shetland</option>{" "}
    <option>Stirlingshire</option> <option>Sutherland</option>{" "}
    <option>West Lothian</option> <option>Wigtownshire</option>{" "}
  </optgroup>{" "}
  <optgroup label="Wales">
    {" "}
    <option>Anglesey</option> <option>Brecknockshire</option>{" "}
    <option>Caernarfonshire</option> <option>Carmarthenshire</option>{" "}
    <option>Cardiganshire</option> <option>Denbighshire</option>{" "}
    <option>Flintshire</option> <option>Glamorgan</option>{" "}
    <option>Merioneth</option> <option>Monmouthshire</option>{" "}
    <option>Montgomeryshire</option> <option>Pembrokeshire</option>{" "}
    <option>Radnorshire</option>{" "}
  </optgroup>{" "}
  <optgroup label="Northern Ireland">
    {" "}
    <option>Antrim</option> <option>Armagh</option> <option>Down</option>{" "}
    <option>Fermanagh</option> <option>Londonderry</option>{" "}
    <option>Tyrone</option>{" "}
  </optgroup>
</select>;