Jón Ögmundsson was an Icelandic Catholic bishop who served as the first leader of the Hólar diocese. Born in southern Iceland around 1052 to a priest, he studied under the nation's first bishop before traveling to Denmark, Norway, and Rome. Following his ordination by the Pope, he was appointed to lead the newly established northern diocese in 1106. He remained in this position until his death in 1121, leaving a significant mark on the religious and cultural landscape of northern Iceland.