Frederick Ponsonby may refer to:
Frederick Ponsonby, 3rd Earl of Bessborough (1758–1844), Anglo-Irish peer Frederick Ponsonby (1775-1849), MP for Galway Borough 1811–1813 Frederick Ponsonby (British Army officer) (1783–1837), British military officer, second son of the 3rd Earl of Bessborough Frederick Ponsonby, 6th Earl of Bessborough (1815–1895), English peer and cricketer Frederick Ponsonby, 1st Baron Sysonby (1867–1935), British soldier and courtier Frederick Ponsonby, 10th Earl of Bessborough (1913–1993), British diplomat, businessman, playwright, politician, and peer Frederick Ponsonby, 4th Baron Ponsonby of Shulbrede (born 1958), British peer and Labour Party politician