| Saint John I Agnus | |
| Birth Date: | 7th century |
| Death Date: | 7th century |
| Death Place: | Maastricht |
| Venerated In: | Roman Catholic Church |
| Feast Day: | 25 July |
Saint John I Agnus (French - Saint Jean l’Agneau) was the 25th bishop of Tongres. He lived in the 7th century and is considered as a saint by the Roman Catholic Church.
A farmer and the son of a rich landowner, he lived in Tihange, then a village near Huy. He was so well known for his pious life that he was chosen to succeed the 24th bishop of Tongres in 596,[1] 625/626,[2] [3] 631[4] [5] or even 639/640[6] according to different sources. These sources are mainly drawn from the saint's Vita in the Gesta Episcoporum Leodiensis by abbot Heriger of Lobbes, a contemporary of bishop Notker of Liège. He only served as bishop for six years before dying and was buried, according to his own wishes, in the chapel of Saints Cosmas and Damian which he had built in a tower of the castle at Huy.