Papyrus 51 (in the Gregory-Aland numbering), designated by siglum 51, is an early copy of the New Testament in Greek. It is a papyrus manuscript of the Epistle to the Galatians, it contains only Gal. 1:2-10.13.16-20. The manuscript paleographically has been assigned to the 4th or 5th century.
The Greek text of this codex is a representative of the Alexandrian text-type (proto-Alexandrian). Kurt Aland placed it in Category II.
It is currently housed at the Ashmolean Museum (P. Oxy 2157) in Oxford.
- Edgar Lobel, Colin H. Roberts, and E. P. Wegener, Oxyrhynchus Papyri XVIII (London: 1941), pp. 1-3.