King Constantine may refer to:
*
Constantine (Briton) (520–523), a king of Dumnonia in sub-Roman Britain
*
Constantine I of Georgia (d. 1412), King of Georgia from 1405 or 1407 until his death
*
Constantine II of Georgia
Constantine II ( ka, კონსტანტინე II, tr) (c. 1447 – 1505), of the Bagrationi dynasty, was a 23rd king and last of United Georgia from 1478 until his death. Early in the 1490s, he had to recognise the independence of h ...
(ca. 1447–1505), of the Bagrationi dynasty, king of Georgia from 1478
*
Constantine I of Greece
Constantine I ( el, Κωνσταντίνος Αʹ, ''Konstantínos I''; – 11 January 1923) was King of Greece from 18 March 1913 to 11 June 1917 and from 19 December 1920 to 27 September 1922. He was commander-in-chief of the Hellenic Army ...
(1868–1923), King of Greece from 1913 to 1917 and from 1920 to 1922
*
Constantine II of Greece (1940–2023), King of Greece from 1964 until abolition of the monarchy of Greece in 1973
*
Constantine mac Fergusa (d. 820), a king of the Picts
*
Constantine I of Scotland
Constantine most often refers to:
* Constantine the Great, Roman emperor from 306 to 337, also known as Constantine I
*Constantine, Algeria, a city in Algeria
Constantine may also refer to:
People
* Constantine (name), a masculine given name ...
(d. 877), a king of the Picts
*
Constantine II of Scotland
Causantín mac Áeda ( Modern Gaelic: , anglicised Constantine II; born no later than 879; died 952) was an early King of Scotland, known then by the Gaelic name ''Alba''. The Kingdom of Alba, a name which first appears in Constantine's lifeti ...
(d. 952), an early King of Scotland
*
Constantine III of Scotland (born ca. 970–997), king of Scots from 995 to 997
*
Constantine I, King of Armenia (r. 1298–1299, d. 1310)
*
Constantine II, King of Armenia
Constantine II ( hy, Կոստանդին Բ), (also Constantine IV; Western Armenian transliteration: ''Gosdantin'' or ''Kostantine''; died 17 April 1344), born Guy de Lusignan, was elected the first Latin King of Armenian Cilicia of the Poitie ...
(r. 1342–1344), also called Guy
*
Constantine III, King of Armenia (r. 1344–1362)
*
Constantine IV, King of Armenia (r. 1362–1373)
{{disambiguation, tndis