Melville William (Mel) Johnson (born 17 May 1942) is an Australian Test cricket match umpire who accumulated a ten-year career total of 67 first-class matches between 1978 and 1988.

A native of the Brisbane suburb of Herston, Mel Johnson umpired in 21 Test matches between 1980 and 1987.^[1] His first match, between Australia and West Indies, held at Adelaide Oval from 26 to 30 January 1980, was won by the visitors by a massive 408 runs. Johnson's partner was Max O'Connell.

Johnson's last Test match was between Australia and New Zealand at Brisbane Cricket Ground from 4 to 7 December 1987. It was won by Australia by 9 wickets with David Boon scoring a century and Craig McDermott, Bruce Reid and Merv Hughes sharing the wickets. Johnson's colleague was Tony Crafter.

Johnson also umpired 49 One Day International (ODI) matches between 1979 and 1988.^[1]

He was also an English teacher at Anglican Church Grammar school circa 1983.