The Custos rotulorum, Latin for "keeper of the rolls" within civil government, is the keeper of the English, Welsh and Northern Irish (and, prior to 1922, southern Irish) county records. The Custos is also the principal Justice of the Peace of the county and keeper of the records of the sessions of the local courts and, by virtue of those offices, the highest civil official in the county. The position is now largely ceremonial and generally undertaken by the Lord Lieutenant of the county.
The office also exists in Jamaica.
England
Bedfordshire Berkshire Buckinghamshire Cambridgeshire Cheshire Cornwall Cumberland Derbyshire Devon Dorset Durham East Riding of Yorkshire Essex Gloucestershire Hampshire Herefordshire Hertfordshire Huntingdonshire Kent Lancashire Leicestershire Lincolnshire Middlesex Norfolk Northamptonshire North Riding of Yorkshire Northumberland Nottinghamshire Oxfordshire Rutland Shropshire Somerset Staffordshire Suffolk Surrey Sussex Warwickshire Westmorland West Riding of Yorkshire Wiltshire Worcestershire
Wales Anglesey Brecknockshire Caernarvonshire Cardiganshire Carmarthenshire Denbighshire Flintshire Glamorgan Merionethshire Monmouthshire Montgomeryshire Pembrokeshire Radnorshire
Ireland Antrim Armagh Carlow (merged with Lord Lieutenancy before 1838) Cavan Clare Cork Donegal Down Dublin Fermanagh (merged with Lord Lieutenancy before 1963) Galway Kerry (merged with Lord Lieutenancy before 1746) Kildare Kilkenny King's County Leitrim Limerick Londonderry Longford Louth (merged with Lord Lieutenancy before 1911) Mayo Meath Monaghan Queen's County Roscommon Sligo Tyrone Tipperary Waterford Westmeath Wexford Wicklow
Jamaica St. Elizabeth Hon. Beryl Rochester, 10 February 2014 to date.
See also Custos rotulorum Lists of lord lieutenancies The Custos Rotulorum Act, 2011 - Jamaica