The High Sheriff of Tyrone is the Sovereign's judicial representative in County Tyrone. Initially an office for lifetime, assigned by the Sovereign, the High Sheriff became annually appointed from the Provisions of Oxford in 1258.^[1] Besides his judicial importance, he has ceremonial and administrative functions and executes High Court Writs.^[2]

The first (High) Shrievalties were established before the Norman Conquest in 1066 and date back to Saxon times.^[3] In 1908, an Order in Council made the Lord-Lieutenant the Sovereign's prime representative in a county and reduced the High Sheriff's precedence.^[4] Despite however that the office retains his responsibilities for the preservation of law and order in a county.^[2]

While the office of High Sheriff ceased to exist in those Irish counties, which had formed the Irish Free State in 1922, it is still present in the counties of Northern Ireland.