Saw Oo (, ) was viceroy of Toungoo (Taungoo) from 1397 to 1399. He succeeded his father Phaungga following his father's death. But Saw Oo was still a youngster, and was removed from office about two years later by King Swa Saw Ke, who wanted a more experienced governor.Sein Lwin Lay 2006: 25Hmannan Vol. 1 2003: 434

He is also known as "Ya Kya Saw Oo" (ရာကျ စောဦး, "Saw Oo who lost the office").

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