| Charoensri Chanamayu | |
| Full Name: | Charoensri Chanamayu |
| House: | Chakri Dynasty |
| Mother: | Chao Chom Manda Saeng Galyanamitra |
| Birth Date: | 31 March 1878 |
| Birth Place: | Grand Palace Bangkok, Siam |
| Death Place: | Bangkok, Siam |
| Signature: | Signature of Princess Charoensi Chanamayu.png |
Princess Charoensri Chanamayu or Phra Chao Boromwongse Ther Phra Ong Chao Charoensri Chanamayu (RTGS: Charoensi Chonmayu) (Thai: พระเจ้าบรมวงศ์เธอ พระองค์เจ้าเจริญศรีชนมายุ) (31 March 1878 - 24 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.
| Princess Charoensri Chanamayu | Father: Chulalongkorn, King Rama V of Siam | Paternal Grandfather: Mongkut, King Rama IV of Siam | Paternal Great-grandfather: Buddha Loetla Nabhalai, King Rama II of Siam |
| Paternal Great-grandmother: Queen Sri Suriyendra | |||
| Paternal Grandmother: Queen Debsirindra | Paternal Great-grandfather: Prince Sirivongse, the Prince Matayabidaksa | ||
| Paternal Great-grandmother: Mom Noi Sirivongs na Ayudhya | |||
| Mother: Chao Chom Manda Saeng Galyanamitra | Maternal Grandfather: Phraya Jayavichit | Maternal Great-grandfather: Chao Phraya Nikara Bodindra | |
| Maternal Great-grandmother: unknown | |||
| Maternal Grandmother: unknown | Maternal Great-grandfother: unknown | ||
| Maternal Great-grandmother: unknown |