The British Mandate for Mesopotamia was a Mandate proposed to be entrusted to Britain at the San Remo, Italy-based conference, in accordance with the Sykes–Picot Agreement.

The Kingdom of Iraq under British Administration or Mandatory Iraq ( ) was created in 1921 following the 1920 Iraqi Revolt against the proposed British Mandate of Mesopotamia, and enacted via the 1922 Anglo-Iraqi Treaty.