Princess Kanokvanna Lekha (Thai: กนกวรรณเลขา ; RTGS: Kanokwan Lekha ; 21 December 1857 - 29 June 1918) was a Princess of Siam (later Thailand). She was a member of the Siamese royal family, a daughter of King Mongkut and Chao Chom Manda Tieng Rojanadis. ^[1]

Her mother was Tieng Rojanadis (is a daughter of Dis Rojanadis and Klai Rojanadis). Her full name given by her father was Phra Chao Borom wong Ther Phra Ong Chao Kanokvanna Lekha (Thai: พระเจ้าบรมวงศ์เธอ พระองค์เจ้ากนกวรรณเลขา).

Princess Kanokvanna Lekha died 29 June 1916 at the age 60.