Sir William Palin Elderton KBE PhD (Oslo) (1877–1962) was a British actuary who served as president of the Institute of Actuaries (1932–1934).
Elderton also had a very long association with the statistical journal Biometrika.
In its early days he published several articles, and in 1935 he became chairman of the Biometrika Trust.
In 1900 when he was training to be an actuary Elderton met Karl Pearson and was drawn into the University College statistical group.
Elderton was an invited speaker in the International Congress of Mathematicians 1908, Rome.