Yaovabha Bongsanid (Thai: เยาวภาพงศ์สนิท; RTGS: Yaowaphaphongsanit; 28 August 1884 – 13 June 1934) was the Princess of Siam (later Thailand).

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

Princess Yaovabha Bongsanid of Siam was born on 28 August 1884 at the Grand Palace.

She was the forty-seventh daughter of King Chulalongkorn of Siam (Rama V the Great) and The Noble Consort (Chao Chom Manda) Mom Rajawongse Nueng Sanidvongs (daughter of Prince Sai Sanidvongs.

Princess Yaovabha Bongsanid died on 13 June 1934 at the Grand Palace, at the age of 49 years and 11 months.