Uncial 030 or Codex Nanianus is a Greek uncial manuscript of the New Testament Gospels, written on parchment. It is designated by the siglum U or 030 in the Gregory-Aland numbering of New Testament manuscripts, and ε 90 in the von Soden numbering of New Testament manuscripts. Using the study of comparativie writing styles (palaeography), it has been assigned to the 9th century CE. The manuscript has complex contents, with full marginalia (see picture).
The text of the codex usually follows the majority of New Testament manuscripts, but has some variants which represent the Alexandrian tradition. The manuscript is rarely cited in the present critical editions of the Greek New Testament.