Princess Ōta (大田皇女 Ōta no himemiko) (? - 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, and the mother of Princess Ōku and Prince Ōtsu. Her mother was Lady Ochi, whose father is Soga no Kurayamada no Ishikawamaro.
She was not in good health by nature. She died in around 668 when Princess Ōku was seven years old and Prince Ōtsu five. Her body was buried on the 27th day of the 2nd month in that year, together with Empress Saimei and Ohta's aunt, Empress Dowager Hashibito.