Sunity Devi CIE (30 September 1864 – 10 November 1932) was the Maharani of the princely state of Cooch Behar, British India.

[1] She was a daughter of the renowned Brahmo Samaj reformist, Keshub Chandra Sen of Calcutta, and Jagonmohini Sen. She was married to Nripendra Narayan (1863-1911), the Maharaja of Cooch Behar in 1878, when she was only fourteen years of age.

[10] She authored a book "The Beautiful Mogul Princesses", which was published in 1918 by W. Thacker & Co. 2, Creed Lane, Ludgate Hill, London.

She also authored a short story collection, "Bengal Dacoits and Tigers", published in 1916 by Thacker, Spink and Company, Calcutta.

1887 – Companion of the Order of the Crown of India on the occasion of her attending with her husband Nripendra Narayan, the Golden jubilee celebration of Queen Victoria.