Tiberius Claudius Cogidubnus (or Togidubnus) was appointed king of the Regnenses, a southern British tribe, following the Roman invasion of Britain in 43 AD. He is known from a brief mention by Tacitus, and an inscription on an altar dedicated to Neptune and Minerva found in Chichester, and he has been linked with the Roman villa at Fishbourne. He may have been an heir of Verica of the Atrebates.

Cogidubnus is his British name; his two Roman names indicate he was given Roman citizenship by the emperor Claudius.

(Not to be confused with Togodumnus.)