Livingston Middlemost (1 April 1839 – 28 October 1897) was an English first-class cricketer.

Middlemost was born at Westoe, South Shields. He made his debut in first-class cricket for the North against Surrey at Salford in 1860.^[1] Batting once in the match, Middlemost was dismissed for 4 runs in the North's first-innings by H. H. Stephenson.^[2] He made a second first-class appearance seventeen years later for the Players of the North against the Gentlemen of the North at Huddersfield.^[1] Batting twice in the match, he was dismissed for a duck batting at number eleven in the Player's first-innings by William Mycroft, while in their second-innings he opened the batting, scoring 17 runs before retiring out.^[3]

By profession, he was a woollen manufacturer and merchant.^[4][5] A year prior to his death he had travelled to Australia for health reasons.^[6] He died suddenly on 28 October 1897 at Huddersfield, having returned from playing golf at Fixby.^[6]