Longest Serving Australian Heads of Government by Time in Office

Can you name the top 20 longest serving Australian heads of government by time in office? (both at federal and state level).

Includes Prime Ministers (federal) and Premiers/Chief Ministers (state/territory).

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Last updated: June 1, 2025

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Time in office	Jurisdiction	Party	Answer
26 years, 125 days	South Australia	Liberal & Country League	Sir Thomas Playford IV
19 years, 114 days	Queensland	Country & National	Sir Joh Bjelke-Petersen
18 years, 182 days	Tasmania	Labor	Sir Robert Cosgrove
18 years, 163 days	Federal	United Australia/Liberal	Sir Robert Menzies
17 years, 77 days	Victoria	Liberal & Country/Liberal	Sir Henry Bolte
13 years, 240 days	Tasmania	Labor	Eric Reece
11 years, 335 days	Western Australia	Liberal	Sir David Brand
11 years, 325 days	Tasmania/Federal	Labor/United Australia	Joseph Lyons
11 years, 278 days	New South Wales	Free Trade	Sir Henry Parkes
11 years, 267 days	Federal	Liberal	John Howard
10 years, 180 days (Incumbent)	Australian Capital Territory	Labor	Andrew Barr
10 years, 179 days	Victoria	Country	Sir Albert Dunstan
10 years, 158 days	Queensland	Country	Sir Francis Nicklin
10 years, 121 days	New South Wales	Labor	Bob Carr
10 years, 91 days	Queensland	Labor	William Forgan Smith
10 years, 51 days	New South Wales	Labor	Neville Wran
10 years, 48 days	Western Australia	Pro-Forrest	Sir John Forrest
9 years, 299 days	South Australia	Labor	John Bannon
9 years, 236 days	New South Wales	Liberal	Sir Robert Askin
9 years, 230 days	South Australia	Labor	Mike Rann