Ilyas ibn Asad

{{Infobox monarch

| name =Ilyas ibn Asad

| title =Amir of Herat

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| reign = 819–856

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| predecessor =None

| successor =Ibrahim

| spouse =

| issue =Ibrahim ibn Ilyas

| royal house =

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| father =Asad ibn Saman

| mother =

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| death_date = c. 856

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| religion = Islam

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Ilyas ibn Asad (died 856) was a Samanid ruler of Herat (819–856). He was one of the four sons of Asad.

In 819 Ilyas was granted authority over the city of Herat by Caliph Al-Ma'mun's governor of Khorasan, Ghassan ibn 'Abbad, as a reward for his support against the rebel Rafi' ibn Laith. Unlike his other three brothers, Ilyas was not given a city in Transoxiana. When he died in 856, control of Herat was given to his son Ibrahim.