Nainsukh

thumb|upright=1.35|Raja Balwant Singh examining a painting with Nainsukh, 1745–1750, Rietberg Museum. thumb|300px|Raja Balwant Singh making a Hindu Puja (Hinduism)|puja, c. 1750 thumb|300px|Raja Dhrub Dev assesses a horse; it was usual for horses to be shown off in front of a white sheet, to better appreciate their form

Nainsukh (; 1710 – 1778) was an Indian painter. He was the younger son of the painter Pandit Seu and, like his older brother Manaku of Guler, was an important practitioner of Pahari painting, and has been called "one of the most original and brilliant of Indian painters". He was a member of the Seu-Manaku-Nainsukh family.