Leonard Arthur "Lenny" McPherson (born Balmain, New South Wales 19 May 1921; died Cessnock, New South Wales, 28 August 1996) also Lennie, was one of the most notorious and powerful Australian career criminals of the late 20th century. McPherson is believed to have controlled most of Sydney's organised crime activity for several decades, alongside his contemporary Abe Saffron (who was dubbed "Mr Sin") and associate George Freeman.
Universally feared by adversaries and often referred to as Sydney's "Mr Big" of organised crime, McPherson built up an extensive network of criminal activities that included robbery, theft and extortion rackets, illegal gambling, "sly-grog shops" (illegal alcohol outlets), prostitution and drug dealing, and his influence is also believed to have extended to South East Asia and the United States
McPherson's well-earned reputation for extreme brutality is exemplified by an incident recounted in Tony Reeves' 2005 biography. McPherson had been estranged from his mother for many years, but on her 70th birthday, he unexpectedly turned up at her flat, carrying a live rabbit. He demanded to know why he had not been invited to her birthday party, and when she admitted that it was because of his criminal activities, the furious McPherson tore the rabbit's head off, threw the still-twitching body at her feet and stormed off. Reeves also states that McPherson savagely brutalised his first wife on numerous occasions—on one occasion, when he accused her of having an affair, he tied one of her legs to a tree and the other to the back of his car, started the car, took up the slack on the ropes and threatened to tear her in half.
McPherson was featured as a character in the Australian crime drama series Underbelly: A Tale of Two Cities, in which he was played by actor John McNeill.
Lenny McPherson was born in the inner-Sydney suburb of Balmain in 1921, the tenth child of metalworker William McPherson and his wife Nellie. He had some schooling at Birchgrove Primary School, but did not go on to secondary school.