| Oraprabandh Rambai | |
| Full Name: | Oraprabandh Rambai |
| House: | Chakri dynasty |
| Mother: | On Bunnag |
| Birth Date: | 7 July 1885 |
| Birth Place: | Grand Palace, Bangkok, Siam |
| Death Place: | On-at Villa, Cha-am, Siam |
Princess Oraprabandh Rambai (Thai: อรประพันธ์รำไพ; ; 7 July 1885 - 25 May 1933), was the Princess of Siam (later Thailand). She was a member of Siamese royal family. She is a daughter of Chulalongkorn.
Her mother was On Bunnag, daughter of Lord (Chao Phraya) Surabandh Bisudhi (niece of Si Suriyawongse). She is the elder sister of Princess Adisaya Suriyabha. She and her mother, and younger sister lived together firstly in the Grand Palace, then moved to the area of Dusit Palace, and lived there all of her life.
After an illness she died on 25 May 1933, at the age of 47.