John Doe

The name John Doe is typically used in the United States as a placeholder name for a male party in a legal action or legal discussion whose true identity is unknown. Male corpses or emergency room patients whose identity is unknown are also known by the name John Doe. A female who is not known is often referred to as Jane Doe. A child or baby whose identity is unknown can be referred to as Baby Doe or, in one particular case, as Precious Doe. Additional people in the same family may be called James Doe, Judy Doe, etc. Commonly used in the United States of America, though rarely used now in other developed countries.

The Doe names are often, though not always, used for anonymous or unknown defendants. Another set of names often used for anonymous parties, particularly plaintiffs, are Richard Roe for males and Jane Roe for females (as in the landmark U.S. Supreme Court abortion decision Roe v. Wade). The Oxford English Dictionary states that John Doe is "the name given to the fictitious lessee of the plaintiff, in the (now obsolete) mixed action of ejectment, the fictitious defendant being called Richard Roe". Likewise, the Nuttall Encyclopaedia states that John O'Noakes or John Noakes is a fictitious name for a litigious person, used by lawyers in actions of ejectment.

Even outside the specific legal context, the name John Doe is often used in general discourse and popular culture to refer to an unknown person. A famous example is the Frank Capra film Meet John Doe.