Princess Ōta

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| name = Princess Ōta

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| spouse = Emperor Tenmu

| issue = Princess Ōku
Prince Ōtsu

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| father = Emperor Tenji

| mother = Soga no Ochi-no-iratsume

| birth_date = 644?

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| death_date = {{death year and age|668|644}}?

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{{nihongo|Princess Ōta|大田皇女|Ōta no himemiko}} (644?–668?) was royalty in Japan during the Asuka Period. She was the eldest daughter of Emperor Tenji. She was the elder sister of Princess Uno-Sarara.{{Cite book |last=Ebersole |first=Gary L. |url=https://books.google.com/books?id=pdv_oyEq4VQC |title=Ritual Poetry and the Politics of Death in Early Japan |date=1992-08-17 |publisher=Princeton University Press |isbn=978-0-691-01929-1 |pages=242 |language=en}} She was the mother of Princess Ōku and Prince Ōtsu with Emperor Tenmu.{{Cite book |last=Cranston |first=Edwin A. |url=https://books.google.com/books?id=KqWjwalbmx4C |title=A Waka Anthology: Volume One: The Gem-Glistening Cup |date=1998-03-01 |publisher=Stanford University Press |isbn=978-0-8047-3157-7 |pages=813 |language=en}} Her mother was Lady Ochi, whose father was Soga no Kurayamada-no-Ishikawamaro.

She was not in good health by nature. She died around 668 when Princess Ōku was seven years old and Prince Ōtsu five. Her body was buried on the 27th day of the second month in that year, together with Empress Saimei and Ōta's aunt, Empress Dowager Hashibito.