| Birth Date: | 31 January 1804 |
| Birth Place: | Batala, Punjab, Sikh Empire |
| Death Date: | 1805 |
| Death Place: | Punjab, Sikh Empire |
| House: | Sukerchakia |
| Father: | Maharaja Ranjit Singh |
| Mother: | Maharani Mehtab Kaur |
Kunwar Ishar Singh (31 January 1804 - 1805)[1] [2] was the son of Ranjit Singh, Maharaja of the Sikh Empire and his first wife Maharani Mehtab Kaur of the Kanhaiya Misl. Ishar Singh was the first son of Mehtab Kaur and the second son of Ranjit Singh, as his second wife Maharani Datar Kaur of the Nakai Misl gave birth to his first son and heir apparent in 1801.[3]
The birth of Ishar Singh delighted Mehtab's mother Sada Kaur the most, she named him Ishar Singh. However, the prince died in infancy.[4] It is said that the child was not the biological son of Mehtab Kaur and Ranjit Singh, but only procured by Mehtab Kaur and presented to Ranjit Singh who accepted him as his son.[5]