Editing Premier of Western Australia (section)

==Graphical timeline==
<timeline>
ImageSize  = width:1000 height:auto barincrement:12
PlotArea = top:10 bottom:100 right:150 left:15
AlignBars = late

DateFormat = dd/mm/yyyy
Period = from:01/01/1890 till:30/11/2023
TimeAxis = orientation:horizontal
ScaleMajor = unit:year increment:10 start:1890

Colors=
  id:canvas value:gray(0.5)
  id:LIB value:blue legend:Liberal
  id:NAT value:powderblue legend:Nationalist
  id:LWA value:skyblue legend:Liberal_(pre–1917)
  id:LAB value:red legend:Labor
  id:NO value:gray(0.6) legend:No_party

Legend = columns:3 left:150 top:50 columnwidth:200

TextData =
  pos:(20,55) textcolor:black fontsize:M
  text:"Political parties:"

BarData =
  bar:JohnForrest
  bar:GeorgeThrossell
  bar:GeorgeLeake
  bar:AlfMorgans
  bar:WalterJames
  bar:HenryDaglish
  bar:HectorRason
  bar:NewtonMoore
  bar:FrankWilson
  bar:JohnScaddan
  bar:HenryLefroy
  bar:HalColebatch
  bar:JamesMitchell
  bar:PhilipCollier
  bar:JohnWillcock
  bar:FrankWise
  bar:RossMcLarty
  bar:AlbertHawke
  bar:DavidBrand
  bar:JohnTonkin
  bar:CharlesCourt
  bar:RayO'Connor
  bar:BrianBurke
  bar:PeterDowding
  bar:CarmenLawrence
  bar:RichardCourt
  bar:GeoffGallop
  bar:AlanCarpenter
  bar:ColinBarnett
  bar:MarkMcGowan
  bar:RogerCook

PlotData =
   width:5 align:left fontsize:S shift:(5,-4) anchor:till
  bar:JohnForrest from:29/12/1890 till:14/02/1901 color:NO text:"[[John Forrest]] (1890–1901)"
  bar:GeorgeThrossell from:14/02/1901 till:27/05/1901 color:NO text:"[[George Throssell]] (1901)"
  bar:GeorgeLeake from:27/05/1901 till:21/11/1901 color:NO
   from:23/12/1901 till:24/06/1902 color:NO text:"[[George Leake]] (1901, 1901–1902)"
  bar:AlfMorgans from:21/11/1901 till:23/12/1901 color:NO text:"[[Alf Morgans]] (1901)"
  bar:WalterJames from:01/07/1902 till:10/08/1904 color:NO text:"[[Walter James (Australian politician)|Walter James]] (1902–1904)"
  bar:HenryDaglish from:10/08/1904 till:25/08/1905 color:LAB text:"[[Henry Daglish]] (1904–1905)"
  bar:HectorRason from:25/08/1905 till:07/05/1906 color:NO text:"[[Hector Rason]] (1905–1906)"
  bar:NewtonMoore from:07/05/1906 till:16/09/1910 color:NO text:"[[Newton Moore]] (1906–1910)"
  bar:FrankWilson from:16/09/1910 till:07/10/1911 color:NO 
   from:27/07/1916 till:28/06/1917 color:LWA text:"[[Frank Wilson (politician)|Frank Wilson]] (1910–1911, 1916–1917)"
  bar:JohnScaddan from:07/10/1911 till:27/07/1916 color:LAB text:"[[John Scaddan]] (1911–1916)"
  bar:HenryLefroy from:28/06/1917 till:17/04/1919 color:NAT text:"[[Henry Lefroy]] (1917–1919)"
  bar:HalColebatch from:17/04/1919 till:17/05/1919 color:NAT text:"[[Hal Colebatch]] (1919)"
  bar:JamesMitchell from:17/05/1919 till:16/04/1924 color:NAT
   from:24/04/1930 till:24/04/1933 color:NAT text:"[[James Mitchell (Australian politician)|James Mitchell]] (1919–1924, 1930–1933)"
  bar:PhilipCollier from:16/04/1924 till:24/04/1930 color:LAB
   from:24/04/1933 till:19/08/1936 color:LAB text:"[[Philip Collier]] (1924–1930, 1933–1936)"
  bar:JohnWillcock from:20/08/1936 till:31/07/1945 color:LAB text:"[[John Willcock]] (1936–1945)"
  bar:FrankWise from:31/07/1945 till:01/04/1947 color:LAB text:"[[Frank Wise]] (1945–1947)"
  bar:RossMcLarty from:01/04/1947 till:23/02/1953 color:LIB text:"[[Ross McLarty]] (1947–1953)"
  bar:AlbertHawke from:23/02/1953 till:02/04/1959 color:LAB text:"[[Bert Hawke]] (1953–1959)"
  bar:DavidBrand from:02/04/1959 till:03/03/1971 color:LIB text:"[[David Brand]] (1959–1971)"
  bar:JohnTonkin from:03/03/1971 till:08/04/1974 color:LAB text:"[[John Tonkin]] (1971–1974)"
  bar:CharlesCourt from:08/04/1974 till:25/01/1982 color:LIB text:"[[Charles Court]] (1974–1982)"
  bar:RayO'Connor from:25/01/1982 till:25/02/1983 color:LIB text:"[[Ray O'Connor]] (1982–1983)"
  bar:BrianBurke from:25/02/1983 till:25/02/1988 color:LAB text:"[[Brian Burke (Australian politician)|Brian Burke]] (1983–1988)"
  bar:PeterDowding from:25/02/1988 till:12/02/1990 color:LAB text:"[[Peter Dowding]] (1988–1990)"
  bar:CarmenLawrence from:12/02/1990 till:16/02/1993 color:LAB text:"[[Carmen Lawrence]] (1990–1993)"
  bar:RichardCourt from:16/02/1993 till:10/02/2001 color:LIB text:"[[Richard Court]] (1993–2001)"
  bar:GeoffGallop from:10/02/2001 till:25/01/2006 color:LAB text:"[[Geoff Gallop]] (2001–2006)"
  bar:AlanCarpenter from:25/01/2006 till:23/09/2008 color:LAB text:"[[Alan Carpenter]] (2006–2008)"
  bar:ColinBarnett from:23/09/2008 till:17/03/2017 color:LIB text:"[[Colin Barnett]] (2008–2017)"
  bar:MarkMcGowan from:17/03/2017 till:08/06/2023 color:LAB text:"[[Mark McGowan]] (2017–2023)"
  bar:RogerCook from:08/06/2023 till:end color:LAB text:"[[Roger Cook (politician)|Roger Cook]] (2023–present)"
</timeline>