Nicolson Calvert (c. 1724 – 4 May 1793) was an English politician. He was the oldest surviving son of Felix Calvert of Furneaux Pelham in Hertfordshire. His mother Christian was the daughter of Josiah Nicolson, a brewer from Clapham. He was educated at Bury St Edmunds Grammar School and at Trinity College, Cambridge. He owned Hunsdon House in Hertfordshire, which he inherited from his grandfather Felix Calvert. He was a Member of Parliament (MP) for the borough of Tewkesbury from 1754 to 1774.