Junia or Junias (Biblical Greek: Ἰουνία/Ἰουνίας, Iounia/Iounias) was a Christian in the first century known from Paul the Apostle's letter to the Romans.
There has been dispute surrounding both Junia's gender and apostolic status, although she has been viewed as female through most of Christian history as well as by the majority of scholars. The precise nature of her apostolic status, however, has been more debated. With the exception of the reference to a masculine "Junias" in the Index Discipulorum, purportedly from Epiphanius of Salamis (fourth century), the first texts regarding Junia as a male named Junias come from 12th century manuscripts and the first named author to describe Junia as a male was Giles of Rome in the 13th century.