Sri Bajarindra (Thai: ????????????; RTGS: Si Phatcharinthra; 1 January 1864 – 20 October 1919), also known as Saovabha Phongsri (Thai: ?????????????; RTGS: Saowapha Phongsi (Pronunciation)), was an agnatic half-sister and consort of King Chulalongkorn (Rama V) of Thailand, and mother of both King Vajiravudh (Rama VI) and King Prajadhipok (Rama VII).
As in accordance with Thai royal tradition, King Vajiravudh later bestowed on his mother the title of "Queen Mother Sri Bajrindra".