| Oradaya Debkanya | |
| Birth Date: | 18 September 1859 |
| Birth Place: | Bangkok, Siam |
| Death Place: | Bangkok, Siam |
| Full Name: | Oradaya Debkanya |
| Mother: | Bua Na Nakhon |
| House: | Chakri Dynasty |
Princess Oradaya Debkanya (Thai: อรไทยเทพกัญญา ; ; 18 September 1859 - 4 April 1906) was the princess of Siam (later Thailand She was a member of the Siamese royal family and is a daughter of King mongkut and Consort Bua.
Her mother was Chao Chom Manda Bua Na Nakhon (a daughter of Phraya Nakhon (Noi Na Nakhon), She was given the full name Phra Chao Borom Wong Ther Phra Ong Chao Oradaya Debkanya (Thai: พระเจ้าบรมวงศ์เธอ พระองค์เจ้าอรไทยเทพกัญญา) by her father.
Princess Oradaya Debkanya died on 4 April 1906 at the age of 46.