Prinsep may mean any of several notable members of the British Prinsep family.
The family descended from John Prinsep, an 18th-century merchant who was the son of Rev. John Prinsep, rector of Saundby, Nottinghamshire, and Bicester, Oxfordshire. John Prinsep, his son, founded indigo production in India as well as the making of cotton fabrics in Bengal, opened a copper mint in India and was a founder of the Westminster Life Insurance Society in London, where he later served as Alderman and in Parliament. Prinsep arrived in India as a soldier in the army of the East India Company but became a merchant soon afterwards. During his 16 years in India, John Prinsep amassed a £40,000 fortune, which he used to set himself up as a London businessman and get himself elected to Parliament. Prinsep made two large fortunes and lost both. He was the first of three succeeding generations of Prinseps in India, all of whom were known for their artistic abilities. Among his descendants are the artist Valentine Cameron Prinsep, the Anglo-Indian antiquarian, scholar and architect James Prinsep.