Malcolm James McCusker AC CVO KC (born 6 August 1938) is an Australian barrister and philanthropist who was the 31st Governor of Western Australia, serving from July 2011 to June 2014.

In his role as governor, McCusker and his wife served as the patrons for over 100 charitable organisations, including the Perth International Arts Festival, Telethon, and the West Australian Ballet, and the Western Australian branches of Anglicare, the Royal Flying Doctor Service, the Royal Life Saving Society, the RSPCA, and St. John Ambulance.

In October 1997, he was involved in the rescue of two men, including former Australian rules footballer Brian Sierakowski, whose surf ski had been bitten in half by a five-metre (16-foot) long white pointer shark 50 metres (160 ft) off of Cottesloe Beach.

After being appointed governor, he declared his intention to donate his $422,678 salary to charities, including the Lions Eye Institute, Salvation Army and organisations devoted to the health of Australia's indigenous peoples.

[9] In June 2014, McCusker retired as governor when his three-year term expired, and resumed practice as a barrister in Perth.

In late 2018 and early 2019, he led a panel to draft voluntary assisted dying laws for the McGowan government.