Jón Loftsson (Modern Icelandic: [ˈjouːn ˈlɔf(t)sɔn]; Old Norse: Jón Loptsson [ˈjoːn ˈloptsˌson]; c. 1124–1197) was chieftain of Oddi at Rangárvellir in the south part of Iceland.
He was educated at Konghelle (Kungahälla) in Bohuslän (Båhuslen) which at that time a royal center of the Kingdom of Norway.
The poem Nóregs konungatal was composed for Jón Loftsson and recounts his descent from the Norwegian royal line.
At a young age, the great scholar Snorri Sturluson was fostered and educated by Jón Loftsson.
In 1179, he participated and was victorious in the conflicts between bishops of the Diocese of Skálholt and secular rulers.