Roman Britain had an estimated population between 2.8 million and 3 million people at the end of the second century. At the end of the fourth century, it had an estimated population of 3.6 million people, of whom 125,000 consisted of the Roman army and their families and dependents.

• Roman Emperors
• Roman Consuls
• Roman Governors of Britania
• British Nobles
• The Tribes of Iron-Age and Roman Britain