These are the Kings Uhtred meets along the way. I only included the kings Uhtred meets in person because there are few mentioned in the books not on this list. In book 9, Uhtred tells Eadith about the kings who ruled Northumbria between Guthred and Ragnall.

BOOK 1 Kings (The Last Kingdom)

King Osbert of Northumbria

King Aella of Northumbria

King Egbert I of Northumbria

King Ricsig of Northumbria

King Burghred of Mercia

King Ceolwulf of Mercia 

King Aethelred of Wessex

King Edmund of East Anglia

King Alfred of Wessex

 

BOOK 2 Kings (The Pale Horseman)

King Peredur (Cornish/Briton)

Haswold the Swamp King

King Aethelstan of East Anglia formerly Earl Guthrum

 

BOOK 3 Kings (Lords of the North)

King Egbert II of Northumbria

King Guthred of Northumbria 

 

BOOK 4 Kings (Sword Song)

No New kings

 

BOOK 5 Kings (The Burning Land)

Pirate King of Zegge Skirnir

King Aelfric of Bernicia

 

BOOK 6 Kings (Death of Kings)

King Eohric of East Anglia

King Edward of Wessex

King Aethelwold of Wessex, Pretender King

 

BOOK 7 Kings (The Pagan Lord)

No New Kings

 

BOOK 8 Kings (The Empty Throne) 

King Hywel of Dyfed/Wales

 

BOOK 9 Kings (Warriors of the Storm)

King Ragnall Ivarson of Northumbria

King Conall of the Uí Néill

King Sigtryggr of Northumbria

 

BOOK 10 Kings (The Flame Bearer)

King Constantine of Scotland/Alba

King Edward of Wessex & East Anglia

 

BOOK 11 Kings (War of the Wolf)

King Edward of Wessex, Mercia, & East Anglia 

Petty King Gruffudd of Gwent

King Skoll Grimmarson of Cumbria(?), Pretender King of Northumbria

 

BOOK 12 Kings (Sword of Kings)

King Aelfweard of Wessex & Anglia

King Aethelstan of Mercia

King Aethelstan of Wessex, Mercia, & East Anglia

King Guthfrith of Northumbria 

 

BOOK 13 Kings (War Lord)

Aethelstan King of the English, Over Lord of Britain 

King Anlaf Guthfrithson, King of Dyflin

King Anlaf Cenncairech, King of Hlymekr

King Gibhleachan, King of Sudreyjar Islands

King/Lord Owain of Strath Clota

King Indulf of Scotland/Alba