Chrodegang (Latin: Chrodogangus; German: Chrodegang, Hruotgang; died 6 March 766) was the Frankish Bishop of Metz from 742 or 748 until his death. He served as chancellor for his kinsman, Charles Martel. Chrodegang is claimed to be a progenitor of the Frankish dynasty of the Robertians. He is recognized as a saint in the Catholic Church and in the Orthodox Church.

He was born in the early eighth century at Hesbaye (Belgium, around the old Roman civitas of Tongeren) of a noble Frankish family, possibly the son of Sigramnus, Count of Hesbaye, and Landrada, daughter of Lambert II, Count of Hesbaye. Landrada was the sister of Rotrude of Hesbaye, Charles Martel's first wife.

He was educated first at the monastery of Saint-Trond, one of the oldest and most powerful abbeys in the Low Countries, and then at the cathedral school of Metz. At the court of Charles Martel, became his referendary, then chancellor, and in 737 prime minister. Sometime after 742, he was appointed to succeed Sigibald as Bishop of Metz, while still retaining his civil office.

In 753 he met and escorted Pope Stephen II when the pontiff visited France to seek help against Lombard incursions. As apostolic delegate to the Frankish kingdom, he was directly involved in the coronation of Pepin in 754 and the subsequent defeat of the Longbard king Aistulf. He accompanied the pope to Ponthieu.

After the death of Saint Boniface, Pope Stephen conferred the pallium on Saint Chrodegang (754–755), thus making him an archbishop, but not elevating the See of Metz. In 762, during a dangerous illness, he introduced among his priests a confraternity of prayer known as the League of Attigny. Chrodegang was well versed in Latin and the native early Old High German. He died at Metz on 6 March 766 and was buried in Gorze Abbey, the site of his principal shrine.

According to M.A. Claussen, "Chrodegang's work lay at the foundation of the Carolingian spiritual revival of later eighth and ninth centuries." In 748 he founded Gorze Abbey (near Metz). He also established St. Peter's Abbey on the Moselle, and did much for the abbeys of Gengenbach and Lorsch. For the latter he is said to have obtained the relics of Saint Nazarius, and for Gorze those of Saint Gorgonius. In his diocese he introduced the Roman Liturgy and musical chant, and also enriched community life for the canons of his cathedral.

Around 755, he wrote a special rule for them, the Regula Canonicorum, later known as 'Rule of Chrodegang'. The rule, containing thirty-four chapters, was based on the Rule of St. Benedict. Its purpose, however, was principally pastoral: to encourage the mutual support of a community as found in a monastic setting, while recognizing the very different responsibilities of canons serving the spiritual needs of the faithful. Chrodegang necessarily adapted the Benedictine rule, particularly in regards to the hospitality characteristic of monasteries, and the care of the sick as there were neither guest houses nor hospices at cathedrals.

The rule was widely circulated and gave an important impulse to the spread of community life among the secular clergy. In 816, it was incorporated in part into the Institutio canonicorum Aquisgranensis established by the Council of Aachen. By the eleventh and twelfth centuries, the Rule of Chrodegang was gradually supplanted by more popular rules based on Augustine.