Papyrus 31 (in the Gregory-Aland numbering), designated by ðÂÂÂ<sup>31</sup>, is an early copy of the New Testament in Greek. It is a papyrus manuscript of the Epistle to the Romans, it contains only Romans 12:3-8. The manuscript paleographically has been assigned to the 7th century. The reverse side is blank. It is possible that it was used as a talisman. Hunt suggested it was a lectionary.
Written in medium-sized sloping uncial letters. It seems to have been copied for reading in church.
The Greek text of this codex is a representative of the Alexandrian text-type. Aland placed it in Category II. An agreement with Codex Sinaiticus against the other chief MSS is observable in l. 9 of the fragment (v. 8).
Papyrus 31 presents unique readings in l. 3 (v. 4) and l. 4 (v. 5) against the other chief MSS.
It is currently housed with the Rylands Papyri at the John Rylands University Library (Gr. P. 4) in Manchester.