Princess Bhaktra Bimalabarna ( ; ; 25 October 1854 - 18 October 1909) was a Princess of Siam (later Thailand). She was a member of Siamese royal family and is a daughter of King Mongkut and Consort Phae Dharmasaroja.
Her mother was Chao Chom Manda Pae Thamsaroj (is a daughter of Ao Thamsaroj and Si Thamsaroj) She was given the full name of Phra Chao Borom Wong Ther Phra Ong Chao Bhaktra Bimalabarna (). She had 3 siblings 1 elder sister and 2 younger brother and 1 younger sister:
Princess Yingyaovalakshana
Princess Bhaktra Bimalabarna
Prince Kashemsanta Sobhaga
Prince Manusyanagamanop (later Vajirananavarorasa) Princess Banchob Benchama
Princess Bhakta Bimalabarna died on 18 October 1909 at the age 54.
