Prince Anusara Siroprasadh or Phra Chao Boromwongse Ther Phra Ong Chao Anusara Siriprasadh (RTGS: Anusorn Siriprasarth) (Thai: พระเจ้าบรมวงศ์เธอ พระองค์เจ้าอนุสรสิริประสาธน์) (21 February 1891 – 6 May 1900), was the Prince of Siam (later Thailand). He was a son of Chulalongkorn, King Rama V of Siam and a member of the Siamese Royal Family. His mother was , daughter of . He had an elder full brother, Prince Isariyabhorn. Prince Anusara Siriprasadh died in childhood on 6 May 1900, at the age of 9 years 3 months.