It is unclear what their prerogatives are, but they are head of the state, deal with Vault City's foreign policies, and revoke citizenship.
- In 2241, Joanne Lynette is the First Citizen of Vault City.
- After the destruction of the Enclave, Senior Council Member McClure was appointed First Citizen.
Behind the scenes
Princeps civitatis, or "First Citizen," was an official title of ancient Roman Emperors at the start of the Roman Empire.