Princess Chudharatana Rajakumari or Phra Chao Boromwongse Ther Phra Ong Chao Chudharatana Rajakumari (RTGS: Chutharat Ratchakumari) (Thai: พระเจ้าบรมวงศ์เธอ พระองค์เจ้าจุฑารัตนราชกุมารี) (17 December 1872 – 31 December 1930) was a Princess of Siam (later Thailand).

She was a member of the Siamese royal family.

She is a daughter of Chulalongkorn, King Rama V of Siam.

Her mother was The Noble Consort (Chao Chom Manda) Morakot Phenkul, daughter of Lord (Phraya) Mahindrasakdi Dhamrong and Dame (Thanpuying) Hunn Phenkul.

She died on 31 December 1930, at the age of 58.