Sir Lancelot Sanderson KC (24 October 1863 – 9 March 1944) was a British Conservative politician and judge.

A barrister of the Inner Temple, he was appointed Recorder of Wigan in 1901^[1] and took silk in 1903.^[2] He was elected as Member of Parliament (MP) for the Appleby division of Westmorland at the January 1910 general election, regaining a formerly Conservative seat which had been held by Liberal MPs since 1900.^[3] He was re-elected in the general election of December 1910, but resigned his seat^[4] and recordership in October 1915, when he was appointed Chief Justice of the High Court of Judicature in Calcutta after Justice Lawrence Hugh Jenkins.^[5] Upon his resignation from that position in 1926, Sanderson was appointed to the Privy Council and sat on the Judicial Committee of the Privy Council from 1934 until 1935.^[6] He died in Lancaster aged 80.

Sanderson was also a cricketer.^[7] He played two first-class matches; the first for Lancashire in 1884, and the second for the Marylebone Cricket Club four years later.^[8]