Princess Charoensri Chanamayu or Phra Chao Boromwongse Ther Phra Ong Chao Charoensri Chanamayu (RTGS: Charoensi Chonmayu) () (31 March 187824 December 1916) was a Princess of Siam (later Thailand). She was a member of the Siamese Royal Family. She was the daughter of Chulalongkorn, King Rama V of Siam.
Her mother was The Noble Consort (Chao Chom Manda) Saeng Galyanamitra (daughter of Phraya Jayavichit, granddaughter of Chao Phraya Nikara Bodindra (Toh) who built Galyanamitra Temple). Princess Charoensri Chanamayu had 3 full siblings; 2 elder brothers and 1 elder sister;
Princess Charoensri Chanamayu died 24 December 1916, aged 38.