Muthis may have been an ephemeral ancient Egyptian pharaoh of the Twenty-ninth Dynasty.
He is sometime reported as a son of Nepherites I who ruled for a brief time before being deposed by an usurper, Psammuthes.
[1] However, this statement is based on an interpretation of a passage in the Demotic Chronicle: His son (i.e. of Nepherites I) was allowed to succeed him.
Nevertheless, the Demotic Chronicle never mentions the name of Muthis and, as pointed out by the Egyptologist John D. Ray, "his son" could be a reference to Hakor instead.
Eusebius gave him a single year of reign and placed him at the very end of the dynasty, after Nepherites II; however, the Armenian version of Eusebius placed him between Psammuthes and Nepherites II.