| Maha Dewi Saw Nyein Oo | |
| Suc-Type: | Successor |
| Spouse: | Min Nyo San |
| Issue: | Aung Zeya |
| Father: | Siboktara Min |
| Mother: | ? |
| Birth Date: | c. 1690s |
| Birth Place: | Sitoktara |
| Death Date: | c. 1760s |
| Death Place: | Shwebo |
| Religion: | Theravada Buddhism |
Saw Nyein Oo (Burmese: စောငြိမ်းဦး, in Burmese pronounced as /sɔ́ ɲéɪ̯ɰ̃ ʔú/) was the mother of King Alaungpaya, the founder of the Konbaung Dynasty of Burma (Myanmar). She was awarded the royal title "Maha Dewi" after her second son became king.[1]