Shepsesre Tefnakht (in Greek known as Tnephachthos), is a prince of Saïs and founder of the relatively short Twenty-fourth dynasty of Egypt who rises to become a Chief of the Ma at his home city.

He is thought to have reigned roughly 732 BCE - 725 BCE or 7 years.

Tefnakht I first began his career as the "Great Chief of the West" and Prince of Saïs, and was a late contemporary of the last ruler of the 22nd dynasty: Shoshenq V. Tefnakht I was actually the second ruler of Saïs; he was preceded by Osorkon C, who is attested by several documents mentioning him as this city's Chief of the Ma and Army Leader, according to Kenneth Kitchen.

A recently discovered statue dedicated by Tefnakht I to Amun-Re reveals important details about his personal origins.

The statue's text states that Tefnakht was the son of a certain Gemnefsutkapu and the grandson of Basa, a priest of Amun near Sais.

Consequently, Tefnakht was not actually descended from a line of Chiefs of the Ma and Libu tribes as traditionally believed but rather came from a family of priests.

Tefnakht's royal name, Shepsesre, translates as "Noble like Re" in Egyptian.