Amalric of Nesle (French: Amaury; died on 6 October 1180) was a Catholic prelate who served as the Latin patriarch of Jerusalem from late 1157 or early 1158 until his death. Amalric focused chiefly on managing church property; he showed very little political initiative and, unlike many contemporary bishops in the crusader states, had no interest in military affairs.

Amalric was born in France. He arrived in the Latin East in the 1130s or early 1140s and became the court chaplain of Queen Melisende. He rose to become prior of the Holy Sepulchre in 1151 probably because of the queen's patronage. In 1157 she selected him to become the next patriarch and, despite some clerical opposition, he was enthroned by early 1158. Melisende's sons, King Baldwin III and King Amalric, paid little attention to him. Amalric of Nesle was instrumental in forcing King Amalric to separate from his wife, Agnes of Courtenay, at the insistence of the High Court. For this reason King Amalric practically excluded him from government, but they worked together on establishing new bishoprics in the kingdom.

King Amalric died in 1174, and the patriarch had no part in the election of his son, Baldwin IV, as the next king. Baldwin IV's mother, Agnes, gained immense influence, and Amalric remained out of favor at court. From 1177 the kingdom was increasingly threatened by the Ayyubid ruler Saladin. Amalric was annoyed when the king allowed the Greek Orthodox patriarch of Jerusalem, Leontius, to enter the kingdom as the representative of Emperor Manuel I Komnenos, whose aid the king hoped to secure; Manuel recalled Leontius in order to maintain good relations with Amalric and, through him, with the papacy. Amalric was too old to travel to Rome to seek Western military aid at the Third Lateran Council in 1179. He died the following year.

Amalric was born in Nesle near Paris. He arrived in the Kingdom of Jerusalem during the reign of King Fulk (r.  1131–1143) and became the court chaplain of Queen Melisende. The kingdom and the other crusader states were ruled by Franks, French-speaking Catholics, but were surrounded by Arab Muslim states.

Amalric became prior of the Church of the Holy Sepulchre by 1151, succeeding Peter of Barcelona, who had become archbishop of Tyre. He was the first prior not to come from the Holy Sepulcher's cathedral chapter. Historian Bernard Hamilton considers it likely that his appointment was arranged by Queen Melisende, who was then reigning with her son King Baldwin III. At the peak of the church hierarchy in the Kingdom of Jerusalem was the patriarch, who had a key role in the selection of the king because he was entitled to perform the coronation. Until 1099, when the Franks captured the city of Jerusalem in the First Crusade, the resident patriarch was Greek Orthodox rather than Catholic (Latin). The Byzantine emperors continued to appoint Greek Orthodox patriarchs of Jerusalem, but they lived in Constantinople and the Franks recognized only the Latin patriarch. The Latin patriarch therefore effectively had authority over both Catholic and Orthodox Christians.

When Patriarch Fulcher died in November 1157, three women of the royal family–Queen Melisende, her stepdaughter Countess Sibylla of Flanders, and the queen's sister Countess Hodierna of Tripoli–chose Amalric to become the next patriarch. King Baldwin appears to have played no role in Amalric's selection. Amalric was enthroned in late 1157 or early 1158. For unknown reasons, his accession to the patriarchate was opposed by the archbishop of Caesarea, Ernesius, and the bishop of Bethlehem, Ralph the Englishman. They complained to Pope Hadrian IV, and Amalric sent the bishop of Acre, Frederick of la Roche, to Rome to secure the pope's support. Hadrian confirmed Amalric's election and sent him a pallium.

In 1159, two rival candidates were elected to become pope: Alexander III and Victor IV. King Baldwin III, the leading barons, the patriarch, and the bishops held a council in Nazareth to deliberate on the matter. The bishops could not agree on which of the two they should recognize as pope. Baldwin was eager to avoid a schism in his kingdom and persuaded the council to remain neutral. Hamilton believes that Amalric's predecessor, Fulcher, would have never allowed the king to make such a decision for him, and concludes that Amalric "does not seem to have had a very forceful personality". Later that year the clergy agreed to recognize Alexander as pope.

King Baldwin III died childless on 10 February 1163. The High Court, with Patriarch Amalric as the spokesman, refused to recognize Baldwin's brother, Amalric, as king unless he repudiated his wife, Agnes of Courtenay. Baldwin's brother had married Agnes in 1157 despite the objections of Patriarch Fulcher, who had declared that, as third cousins, they were too closely related. The demand was accepted. Patriarch Amalric promptly annulled the marriage on the grounds of consanguinity and crowned his namesake on 18 February. Hamilton believes that the official reason for the annulment "masked some more deep-seated animosity" of the lords towards Agnes. He argues the new king must have held the patriarch at least partly responsible for this humiliating condition because, even if he were just a mouthpiece for the barons, the patriarch had the final say in the matter according to canon law. On 29 August 1167 the patriarch celebrated the king's marriage to Maria, a grandniece of Byzantine Emperor Manuel I Komnenos, at the Cathedral of Tyre.