Kyaymyin Mibaya (Burmese: ကြေးမြှင် မိဖုရား; c. 1852 – 1923) was a queen of the fourth rank of King Mindon of the Konbaung dynasty of Myanmar (Burma).

[1] The future queen was born into the yenan-twin yo (ရေနံတွင်းရိုး) noble family line that held the royal grant to exploit the oil wells in Burma.

The family held a document, the "Nawarat Yaung-zon Kyan" (နဝရတ်ရောင်စုံကျမ်း), that recounted their lineage back over 500 years to the Pagan period.

[6] She was a daughter of Thado Mingyi Maha Minhla Mingaung U So, who was the Minister of Horse Affairs and Duke of Yenangyaung, and Wunkadaw Daw Cho.

The British government confiscated 120 boreholes owned by King Mindon and Kyaymyin Mibaya and leased them to Burmah Oil.