Emperor Daigo (醍醐天皇, Daigo-tennō; February 6, 884 – October 23, 930) was the 60th emperor of Japan, according to the traditional order of succession.

Daigo's reign spanned the years from 897 through 930. He is named after his place of burial.

Daigo was the eldest son of his predecessor, Emperor Uda. His mother was Fujiwara no Taneko (or Inshi), daughter of the minister of the center, Fujiwara no Takafuji. He succeeded the throne at a young age after his father, the Emperor Uda, abdicated in 897. His mother died before his ascension, so he was raised by another Uda consort, Fujiwara no Onshi, daughter of the former kampaku Fujiwara no Mototsune.

Daigo's grandfather, Emperor Kōkō, had demoted his sons from the rank of imperial royals to that of subjects in order to reduce the state expenses, as well as their political influence; in addition, they were given the family name Minamoto. As such, Daigo was not born as a royalty and was named Minamoto no Korezane (源維城) until 887, when Daigo's father, Minamoto no Sadami (formerly Prince Sadami), was once again promoted to the Imperial Prince and the heir to the throne. Afterwards, his personal name (imina) was changed to Atsuhito (敦仁親王) or Ono-tei before his ascension of the Chrysanthemum Throne.

Daigo had 21 empresses, imperial consorts, and concubines; he had 36 imperial sons and daughters.

The era name was changed in 898 to mark the beginning of Emperor Daigo's reign. The highlight of Daigo's 34-year reign was that he ruled by himself without the regency of the Fujiwara clan, though he himself was part Fujiwara.

Daigo also ordered construction of several halls in the Daigo-ji, such as the Yakushi hall.

The actual site of Daigo's grave is known. This emperor is traditionally venerated at a memorial Shinto shrine (misasagi) at Kyoto.