Papyrus 139 (designated as 𝔓139 in the Gregory-Aland numbering system) is a small surviving portion of a handwritten copy of part of the New Testament in Greek.
It is a papyrus manuscript of Philemon.
The text survives on a single fragment of a codex, the recto containing about the last half of ten lines of a single column of a page, and the verso containing about the first half of nine lines of the next page.
The manuscript has been assigned paleographically to the fourth century.
[1] 𝔓139 is housed at the Sackler Library at the University of Oxford in Oxford, England.