Sālote Tupou III (born Sālote Mafile‘o Pilolevu; 13 March 1900 – 16 December 1965) was the first Queen regnant and third Monarch of the Kingdom of Tonga from 1918 to her death in 1965. She reigned for nearly 48 years, longer than any other Tongan Monarch.

Sālote (Charlotte) was born on 13 March 1900 in Tonga as the eldest daughter and heir of King George Tupou II of Tonga and his first wife, Queen Lavinia Veiongo. She was not popular, as she was perceived as being born from the 'wrong mother' because of her mother's low rank and was disliked so much that it was not safe for her to go outside the palace garden.

Her mother, Queen Lavinia died from tuberculosis on 25 April 1902. After her death, the Chiefs in Tonga urged King George Tupou II for many years to remarry to produce a male heir. On 11 November 1909, when the King finally married the 16-year-old ʻAnaseini Takipō, (half-sister of the rejected candidate 'Ofakivava'u', from the first search of a wife for the King), the chiefs were jubilant. Queen Anaseni gave birth twice, both girls: HRH The Princess ʻOnelua (born 20 March 1911; died of convulsions aged six months, on 19 August 1911) and HRH The Princess ʻElisiva Fusipala Taukiʻonetuku (born 26 July 1912; died from tubercular peritonitis on 21 April 1933 aged 20).

In December 1909 Sālote was sent to Auckland, New Zealand to start five years of education. She did return to Tonga every Christmas holiday. After December 1914 the King ordered her to stay home in Tonga as hopes for Queen Anaseni giving birth to a male heir were low. She later began a course of instruction in Tongan history and customs.

Married to Viliami Tungī Mailefihi, an adult noble then 28 years old (12 years her senior) in 1916 at the young age of 16, she became the mother of Siaosi Tāufa‘āhau Tupoulahi – later King Tāufa‘āhau Tupou IV –, Uiliami Tuku‘aho (5 November 1920 – 28 April 1936), and Sione Ngū Manumataongo – later Tu‘i Pelehake (Fatafehi) –, plus three miscarriages.

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