Frithubeorht (or Frithbert, Frithuberht, Latin: Frithubertus) (died 23 December AD 766) was an eighth-century medieval Bishop of Hexham.

There are several theories as to why Frithbert's predecessor Acca departed or was driven from the Diocese of Hexham in 732.

Frithubeorht, who was thought to be a strong supporter of the Northumbrian dynasty, was appointed in Acca's place as Bishop of Hexham.

"[7] More recently, the historian John Godfrey, described Firthbert as an "undistinguished prelate.

[9] He is considered a saint by both the Roman Catholic [10] and the Eastern Orthodox Church.