Mungo Wentworth MacCallum (21 December 1941 – 9 December 2020) was an Australian political journalist and commentator.

From the 1970s to the 1990s he covered Australian federal politics from the Canberra Press Gallery for The Australian, The National Times, The Sydney Morning Herald, Nation Review and radio stations 2JJ / Triple J and 2SER. He wrote political commentary for the Australian Broadcasting Corporation (ABC) current affairs and news analysis program The Drum, frequently wrote for the magazine The Monthly, and contributed political commentary to Australia's national Community Radio Network, columns for the Byron Shire Echo and The Northern Star, and a weekly cryptic crossword for The Saturday Paper.

He also authored several books, including Run, Johnny, Run, written after the 2004 Australian federal election. His autobiographical narrative of the Australian political scene, Mungo: the man who laughs – has been reprinted four times. How To Be A Megalomaniac or, Advice to a Young Politician was published in 2002, and Political Anecdotes was published in 2003. In December 2004, Duffy & Snellgrove published War and Pieces: John Howard's last election.