Princess Adelaide of Saxe-Meiningen (13 August 1792 – 2 December 1849) was the queen of William IV of the United Kingdom and Hanover. She was born in Meiningen, Saxe-Meiningen, the seventh child and fourth daughter of George I, Duke of Saxe-Meiningen, and his wife Louise Eleonore of Hohenlohe-Langenburg.
Adelaide married the Duke of Clarence (later William IV) on 11 July 1818 at Kew Palace. The Duke of Clarence was the third son of George III and had been widowed in 1817. The marriage was not a love match, but a dynastic arrangement. However, the couple grew to be close and affectionate.
Adelaide became queen consort when William IV ascended the throne in June 1830. She was a popular queen and was known for her charity work. She also played an important role in the political life of the country, acting as a mediator between her husband and his ministers.
After William’s death in 1837, Adelaide continued to live in England. She died at Bentley Priory in Stanmore, Middlesex, on 2 December 1849. She was buried at St. George’s Chapel, Windsor Castle.