Princess Augusta of Cambridge (19 July 1822 – 5 December 1916) was a member of the British Royal Family, a granddaughter of George III. She married into the Grand Ducal House of Mecklenburg-Strelitz and became the Grand Duchess of Mecklenburg-Strelitz.

Princess Augusta was born on 19 July 1822 at the Palace of Montbrillant, Hanover. Her father was Prince Adolphus, Duke of Cambridge, the seventh son of George III and Charlotte of Mecklenburg-Strelitz. Her mother was Princess Augusta of Hesse-Cassel. As a male line granddaughter of the British monarch, she was styled as a British princess with the prefix Her Royal Highness. The young princess was christened at the same palace on 16 August 1822, by Rev Edward Curtis Kemp (Chaplain to the British Ambassador to the Court of Berlin, The Rt. Hon. Sir George Rose). Three of her godparents were present at the christening:

The rest were not present, possibly being represented by proxies:

The Princess spent her earlier years in Hanover, where her father was the viceroy on behalf of his brother, George IV.

Princess Augusta had one brother, Prince George, later 2nd Duke of Cambridge; and one sister, Princess Mary Adelaide, later Duchess of Teck. As such, Princess Augusta was a first cousin of Queen Victoria and aunt to Mary of Teck, later consort of George V.