Joseph Planta GCH (2 July 1787 – 5 April 1847) was a British diplomat and politician of Romansh-Swiss descent. He was the MP for Hastings, England. Planta's father, also named Joseph Planta (1744–1827), moved from Switzerland to England and became the Principal Librarian of the British Museum in London. He was born at the British Museum and educated at Eton College. He was elected Conservative Member of Parliament for Hastings in southern England, in 1827 and 1830. He was defeated in 1835, but then re-elected in 1837, and again in 1841.