OS grid reference to vice-county conversion
To convert an Ordnance Survey grid reference (e.g. SJ8398 or 33/8398) to vice-county number (i.e. VC59). The converter should work with all valid GB locations, multiple VC numbers will be returned if the area specified spans a boundary.
Used in conjunction with the OS gazetteer this can work well to place named locations in vice-counties or to highlight ambiguities. For Irish localities there is a separate Irish vice-county conversion tool
It's also worth trying herbariaunited's place name to vice-county converter derived from the USGIA gazetteer.
Digitised Watsonian Vice-County Boundary data. © All right reserved, National Biodiversity Network Trust and Crown Copyright 2003, comes with ABSOLUTELY NO WARRANTY. This product is available for not-for-profit use to support biological recording activities strictly under licence with the NBN Trust.

| VC1. West Cornwall with Scilly | VCH1. South Kerry |
| VC2. East Cornwall | VCH2. North Kerry |
| VC3. South Devon | VCH3. West Cork |
| VC4. North Devon | VCH4. Mid-Cork |
| VC5. South Somerset | VCH5. East Cork |
| VC6. North Somerset | VCH6. Waterford |
| VC7. North Wiltshire | VCH7. South Tipperary |
| VC8. South Wiltshire | VCH8. Limerick |
| VC9. Dorset | VCH9. Clare |
| VC10. Isle of Wight | VCH10. North Tipperary |
| VC11. South Hampshire | VCH11. Kilkenny |
| VC12. North Hampshire | VCH12. Wexford |
| VC13. West Sussex | VCH13. Carlow |
| VC14. East Sussex | VCH14. Laois |
| VC15. East Kent | VCH15. South-east Galway |
| VC16. West Kent | VCH16. West Galway |
| VC17. Surrey | VCH17. North-east Galway |
| VC18. South Essex | VCH18. Offaly |
| VC19. North Essex | VCH19. Kildare |
| VC20. Hertfordshire | VCH20. Wicklow |
| VC21. Middlesex | VCH21. Dublin |
| VC22. Berkshire | VCH22. Meath |
| VC23. Oxfordshire | VCH23. Westmeath |
| VC24. Buckinghamshire | VCH24. Longford |
| VC25. East Suffolk | VCH25. Roscommon |
| VC26. West Suffolk | VCH26. East Mayo |
| VC27. East Norfolk | VCH27. West Mayo |
| VC28. West Norfolk | VCH28. Sligo |
| VC29. Cambridgeshire | VCH29. Leitrim |
| VC30. Bedfordshire | VCH30. Cavan |
| VC31. Huntingdonshire | VCH31. Louth |
| VC32. Northamptonshire | VCH32. Monaghan |
| VC33. East Gloucestershire | VCH33. Fermanagh |
| VC34. West Gloucestershire | VCH34. East Donegal |
| VC35. Monmouthshire | VCH35. West Donegal |
| VC36. Herefordshire | VCH36. Tyrone |
| VC37. Worcestershire | VCH37. Armagh |
| VC38. Warwickshire | VCH38. Down |
| VC39. Staffordshire | VCH39. Antrim |
| VC40. Shropshire | VCH40. Londonderry |
| VC41. Glamorgan | |
| VC42. Breconshire | |
| VC43. Radnorshire | |
| VC44. Carmarthenshire | |
| VC45. Pembrokeshire | |
| VC46. Cardiganshire | |
| VC47. Montgomeryshire | |
| VC48. Merionethshire | |
| VC49. Caernarfonshire | |
| VC50. Denbighshire | |
| VC51. Flintshire | |
| VC52. Anglesey | |
| VC53. South Lincolnshire | |
| VC54. North Lincolnshire | |
| VC55. Leicestershire with Rutland | |
| VC56. Nottinghamshire | |
| VC57. Derbyshire | |
| VC58. Cheshire | |
| VC59. South Lancashire | |
| VC60. West Lancashire | |
| VC61. South-east Yorkshire | |
| VC62. North-east Yorkshire | |
| VC63. South-west Yorkshire | |
| VC64. Mid-west Yorkshire | |
| VC65. North-west Yorkshire | |
| VC66. Durham | |
| VC67. South Northumberland | |
| VC68. North Northumberland | |
| VC69. Westmoreland with Furness | |
| VC70. Cumberland | |
| VC71. Isle of Man | |
| VC72. Dumfriesshire | |
| VC73. Kircudbrightshire | |
| VC74. Wigtownshire | |
| VC75. Ayrshire | |
| VC76. Renfrewshire | |
| VC77. Lanarkshire | |
| VC78. Peebleshire | |
| VC79. Selkirkshire | |
| VC80. Roxburghshire | |
| VC81. Berwickshire | |
| VC82. East Lothian | |
| VC83. Midlothian | |
| VC84. West Lothian | |
| VC85. Fife | |
| VC86. Stirlingshire | |
| VC87. West Perth | |
| VC88. Mid Perth | |
| VC89. East Perth | |
| VC90. Angus | |
| VC91. Kincardineshire | |
| VC92. South Aberdeenshire | |
| VC93. North Aberdeenshire | |
| VC94. Banffshire | |
| VC95. Moray | |
| VC96. Easterness | |
| VC97. Westerness | |
| VC98. Main Argyll | |
| VC99. Dunbartonshire | |
| VC100. Clyde Isles | |
| VC101. Kintyre | |
| VC102. South Ebudes | |
| VC103. Mid Ebudes | |
| VC104. North Ebudes | |
| VC105. West Ross | |
| VC106. East Ross | |
| VC107. East Sutherland | |
| VC108. West Sutherland | |
| VC109. Caithness | |
| VC110. Outer Hebrides | |
| VC111. Orkney | |
| VC112. Shetland | |
| VC113/VCS/VCI. Channel Islands |
Further background information is available on wikipedia. The BSBI vice-county census catalogue and atlas project have detail of present-day plant distribution.

