The First Mitchell Ministry was the 15th Ministry of the Government of Western Australia and was led by Nationalist Premier James Mitchell.
It succeeded the Colebatch Ministry on 17 May 1919 after the collapse of Hal Colebatch's brief service as Premier.
It assumed a stability which had been absent from Western Australian politics since the 1914 election.
The ministry was followed by the Collier Ministry on 15 April 1924 after the Nationalist coalition lost government at the state election held on 22 March.
The following ministers served until the reconstitution of the Ministry on 12 April 1921, following the 1921 state election: Premier Colonial Treasurer Minister for Lands Minister for Repatriation Minister for Agriculture Minister for Public Health Minister for Education Minister for the North-West Minister for Works Minister for Water Supply Colonial Secretary (until 25 June 1919) Minister for Railways (from 25 June 1919:) Minister for Mines Minister for Industries Minister for Forests Legend: The following ministers served from their appointment on 12 April 1921 until the end of the Ministry on 15 April 1924, following the 1924 state election: Premier Colonial Treasurer Minister for Lands Minister for Repatriation Minister for Education Minister for the North-West Minister for Justice Minister for Education Minister for the North-West Minister for Justice Minister for Works Minister for Water Supply Minister for Railways Minister for Mines Minister for Forests Minister for Police Minister for Industries Colonial Secretary Minister for Public Health Colonial Secretary Minister for Public Health