Abbhantripaja

{{Use dmy dates|date=April 2021}}

{{unreferenced|date=September 2010}}

{{Infobox royalty

| name = Abbhantripaja

| image = Princess Abbhantripraja.jpg

| caption = The Princess in 1915, aged 26

| spouse =

| full name = Abbhantripaja

| house = Chakri dynasty

| father = Chulalongkorn {{small|(Rama V)}}

| mother = Chao Chom Manda Sae Rojanadis

| birth_date = {{Birth date|1889|10|31|df=y}}

| birth_place = Grand Palace
Bangkok, Siam

| death_date = {{Death date and age|1934|02|18|1889|10|31|df=y}}

| death_place = Bangkok, Siam

}}

Princess Abbhantripaja of Siam ({{langx|th|พระเจ้าบรมวงศ์เธอ พระองค์เจ้าอัพภันตรีปชา}}; RTGS: Apphantripracha; official title: Phra Chao Boromwongse Ther Phra Ong Chao Abbhantripaja; 31 October 1889 – 18 February 1934), was a Princess of Siam (later Thailand). She was a member of Siamese royal family. She was a daughter of Chulalongkorn, King Rama V of Siam.

Her mother was The Noble Consort (Chao Chom Manda) Sae Rojanadis, daughter of Phraya Abbhantrikamas and Bang Rojanadis. She had 2 siblings; elder brother and younger sister;

• Prince Khajera Chirapradidha (23 July 1888 – 7 October 1888)
• Princess Dibyalangkarn (17 January 1891 – 4 June 1932)

Princess Abbhantripaja is nicknamed "Khao" which means 'white' in Thai, due to her fair skin. She was regarded as one of King Rama V's most beautiful daughters, alongside her elder half-sister Princess Suddha Dibyaratana (Princess Suthathip). She was described by those who had seen her as taller than average, gentle and often smiling.

Well-educated and fluent in English, the princess cared deeply about education. She founded an all girls' school named Abbhantri Padung (or Kattiyanee Padung) school, which educated young girls, particularly the princess' own ladies-in-waiting and girls from noble or bourgeois families. She gave her old residence to be used as the school building and moved to a smaller house, in which she later died.

Princess Abbhantripaja died on 18 February 1934, at the age of 44 from influenza and complications from kidney disease.