The Kildalton Cross is a monolithic high cross in Celtic cross form in the churchyard of the former parish church of Kildalton (from Scottish GaelicCill Daltain, "Church of the Foster Son" (i.e. St John the Evangelist) on the island of Islay in the Inner Hebrides, Scotland. It was carved probably in the second half of the 8th century AD, and is closely related to crosses of similar date on Iona. It is often considered the finest surviving Celtic cross in Scotland, and is certainly one of the most perfect monuments of its date to survive on western Europe. The cross and the adjacent roofless medieval parish church are in the care of Historic Scotland (access at all times). A simpler cross of late medieval date stands nearby.
The Kildalton Cross features an iconic image of the Virgin and Child, which is closely related to similar Virgin and Child iconography found on St. Martin's Cross and St. Oran's Cross at Iona. In addition, this panel displays similarities with folio 7v in the Book of Kells. Dr. Hayley Humphrey has suggested in a PhD dissertation  that this type of Virgin and Child iconography may be related to contemporary Marian iconography in the Mediterranean, specifically the Maria Regina which was used in Rome to refute iconoclasm.