thumb|350px|Main Iron Age tribes in Southern Britain.
The names of the Iron Age tribes in Britain were recorded by Roman and Greek historians and geographers, especially Ptolemy, although information from coin distribution has also shed light on the extents of the territories of the various groups that occupied the island. The following tribes have known names although not necessarily the names by which they knew themselves. The approximate extent of their territories in modern terms is also listed.

Central Britain

• Catuvellauni - modern Hertfordshire, Cambridgeshire and Greater London north of the Thames

• Cornovii - modern Cheshire, Derbyshire and Shropshire

• Corieltauvi - modern Lincolnshire, Nottinghamshire and Staffordshire

• Dobunni - modern Gloucestershire, Herefordshire, Oxfordshire and West Midlands

• Iceni - modern Norfolk, Suffolk and Cambridgeshire

• Parisii - modern East Riding of Yorkshire

• Trinovantes - modern Essex and Suffolk

Northern Britain

• Brigantes - modern Yorkshire, Cumbria, Lancashire and County Durham

• Caereni - modern west Sutherland

• Caledonii - Scottish Highlands

• Carnonacae - modern west Ross and Cromarty

• Carvetii - modern northern Cumbria, around Carlisle and the upper valley of the River Eden*

• Cornavii - modern east Sutherland and Caithness

• Corionotatae - modern Scottish borders

• Creones - modern Argyll

• Damnonii - modern Strathclyde

• Decantae - modern east Ross and Cromarty

• Epidii - modern Mull of Kintyre

• Gabrantovices - modern North Yorkshire*

• Lopocares (name uncertain) - south side of Hadrian's Wall around Corbridge*

• Lugi - modern south east Sutherland

• Novantae - traditional Galloway

• Selgovae - traditional Galloway and Dumfriesshire

• Setantii - part of modern Lancashire around the Fylde*

• Smertae - Ross and Cromarty

• Taexali - modern Aberdeenshire

• Textoverdi - south side of Hadrian's Wall in the upper valley of the River Tyne*

• Vacomagi - modern north Grampian region

• Venicones - modern Fife and southern Tayside

• Votadini - coasts of modern Northumberland, Scottish Borders and East Lothian

Asterisked (*) tribes were septs or pagi within Brigantine territory.

Southern Britain

• Ancalites - possibly modern (Hampshire and Wiltshire)

• Atrebates - modern Hampshire and the Thames Valley

• Belgae - (in this context) modern Hampshire and Gloucestershire

• Bibroci (Berkshire)

• Cantiaci - modern Kent

• Durotriges - modern Somerset and Dorset

• Dumnonii - modern Devon, Cornwall and Somerset

• Regnenses - modern Surrey and Sussex

Western Britain

• Deceangli - modern Flintshire and Denbighshire

• Demetae modern Pembrokeshire and west Ceredigion and Carmarthenshire

• Gangani - modern Lleyn peninsula, likely a sept of the Ordovices

• Ordovices - modern Anglesey, Snowdonia and Powys

• Silures - modern South Wales

Others

• Attacotti (origin unknown)

Bibliography

• Anon, 1994, Historical Map and Guide Roman Britain (map), Ordnance Survey, Fourth Edition (Revised)

• Frere, S, 1987, Britannia, Routledge, London

Britain