Jayavarman IX

{{Infobox monarch

| name = Jayavarman IX

| title = King of the Khmer Empire

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| reign =1327 – 1336

| coronation =

| full name = Jayavarmadiparamesvara

| predecessor =Indrajayavarman

| successor =Trasak Paem

| spouse = Angrajadevi

| issue = Chandravaradevi

| royal house =

| dynasty =Varman Dynasty (Cambodia)

| father = Indrajayavarman

| religion = Hinduism (Shaivism)

| mother =

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Jayavarman IX ({{langx|km|ជ័យវរ្ម័នទី៩}}), also known as Jayavarmadiparamesvara was sovereign of the Khmer Empire from 1327 to 1336.

Jayavarman IX was like his father, Indrajayavarman, a convinced Shivaite.

This sovereign is the last king mentioned by inscriptions on the monuments. The last Sanskrit inscription of Cambodia dates from the reign of Jayavarman Parameshwara.