Roger Norreis (died between 1223 and 1225) was Abbot of Evesham in England. He was a controversial figure, installed in several offices against opposition. In his appointment to Evesham, he was accused of immoral behaviour and failing to follow monastic rules. In 1202, Norreis became embroiled in a dispute with his monks and his episcopal superior the Bishop of Worcester; litigation and argumentation lasted until his deposition in 1213. He was then appointed prior of a subsidiary monastic house of Evesham, but was deposed within months, then re-appointed to the office five years later.

Norreis has been described by modern historians as being unsuited for the religious positions to which he was appointed and by one of being completely unsuitable to hold any kind of spiritual role. Nevertheless, even his most severe contemporary critic, Thomas of Marlborough, one of his own monks at Evesham, conceded that Norreis was energetic, entertaining, and enterprising; during his time as abbot of Evesham Abbey he managed to complete the crossing tower of the monastic church.

Roger Norreis died between 1223 and 1225.

Norreis was a native of northern England and his family was probably of Norse origin. He was a monk at Christ Church Priory, the cathedral chapter of Canterbury Cathedral; when he became a monk is unknown. In 1187, he was appointed treasurer of the priory, and in that role was sent by the cathedral chapter to King Henry II of England to plead their case against Baldwin of Forde, the Archbishop of Canterbury. The archbishop and his monks were in dispute over Baldwin's plan to found a collegiate church at Hackington in honour of Thomas Becket which most of the monks opposed because they feared it would diminish the prestige of their priory.

Once Norreis reached the king, he was converted to Baldwin's side, perhaps because of the latter's appointment of Norreis as the cellarer of Christ Church while the pair were at the king's court. The monks resisted this appointment, and in September they appealed to the papacy, arguing that the appointment was against the Benedictine Rule. They also captured and held Norreis in custody, telling anyone who enquired after him that he was sick. Norreis escaped in early 1188 by travelling through the sewer and fled to the safety of the archbishop, who was then at Otford. In a mocking reference to his escape route, Norreis was occasionally known as Roger Cloacarius or "Roger the Drain-Cleaner". Baldwin then tried to have Norreis installed as prior at Christ Church's dependent priory of St Martin's, Dover, but the appointment was never confirmed.

King Henry died on 6 July 1189 and his son Richard I was crowned on 3 September. The succession of a new monarch eventually allowed a truce in the dispute between the Canterbury monks and their archbishop, as Henry had been a supporter of the archbishop's scheme. Before the truce could be hammered out, Baldwin appointed Norreis as prior of Christ Church in October 1189 as another move in the quarrel over the Hackington project. In November, the cathedral chapter secured a compromise that included the abandonment of the scheme and Norreis's dismissal from office. The agreement came at a council held by Richard in late November 1189 at which the monks agreed to let the king settle the dispute over the Hackington project if the archbishop would withdraw Norreis's appointment. Norreis's fellow monks considered him a traitor to their cause, and his reputation was that of someone with few morals. He was also known for ingratiating himself with those in power, including the justiciar Geoffrey fitzPeter. Many of the details concerning Norreis's career at Christ Church come from the works of Gervase of Canterbury, as well as the collection of letters known as the Epistolae Cantuarienses.

Norreis was appointed to the abbacy of Evesham Abbey in 1190 and was blessed as abbot on 13 January 1190. He owed his appointment to King Richard and to Baldwin's attempts to make the dismissal from Christ Church look less like a defeat for the archbishop. Norreis also claimed that he received the office in return for unspecified services he rendered to Richard. There was no attempt at an election by the monks, a lack which went against canon law. During his tenure of office, his monks accused him of fornication, excessive drinking, gluttony, setting up favourites, starving the monks, and appropriating monastic property for his own use. A further offence was his habit of wearing secular clothing rather than the monastic habit prescribed by the Benedictine Rule. All these charges come from one of his monks, the historian Thomas of Marlborough, who wrote much of the history of Evesham known as the Chronicon Abbatiae de Evesham. Thomas's account of Norreis's rule is biased against the abbot and is a self-aggrandising account of how Thomas single-handedly triumphed over both his and his abbey's foes. Norreis did manage some good for the abbey, as it was while he was abbot that the crossing tower of the monastic church was completed.

Early in his tenure Norreis appears to have been somewhat circumspect and did not greatly annoy his monks. The change appears to have happened around 1195, when the monks are first recorded as appealing to higher authority. Because Evesham had traditionally claimed to be exempt from episcopal oversight by the see of Worcester, in which it was located, the monks could only appeal to the papacy or to a papal legate. Hubert Walter, the Archbishop of Canterbury after Baldwin, held a legateship for England until July 1195 and so the monks appealed to him. Walter forced Norreis to make some compromises with his subordinates, but the truce did not last long, and the monks once again complained of their treatment. They were visited by the new Bishop of Worcester John of Coutances some time between 1196 and 1198, but Norreis succeeded in avoiding any severe sanctions by offering gifts to the bishop. The monks again appealed to Walter in about 1200, but between the archbishop's preoccupation with political affairs and Norreis's promises to reform, no solid changes occurred.