Post | Minister | Term | Party |
| Prime Minister | Gen. Jan Smuts | 1919 | – | SAP |
| Gen. Louis Botha | 1910 | 1919 | SAP |
| Minister of Agriculture | | 1913 | 1920 | SAP |
| Minister of Defence | | The Hon. Hendrik Mentz MP | | 1919 | – | SAP |
| The Hon. Jan Smuts MP | 1912 | 1919 | SAP |
| Minister of Education | | 1910 | – | SAP |
| Minister of Finance | | 1917 | 1920 | SAP |
| The Hon. Henry Burton MP | 1915 | 1917 | SAP |
| Minister of Public Health (newly formed) | | 1919 | – | SAP |
| Minister of Interior Affairs | | 1919 | – | SAP |
| Gen. Jan Smuts | 1913 | 1919 | SAP |
| Minister of Justice | | 1913 | – | SAP |
| Minister of Lands and Irrigation | | 1915 | – | SAP |
| Minister of Mines and Industry | | 1912 | – | SAP |
| Minister of Native Affairs | Gen. Jan Smuts | 1919 | – | SAP |
| Gen. Louis Botha | 1912 | 1919 | SAP |
| Minister of Posts and Telegraphs | | 1919 | 1920 | SAP |
| The Hon. J. H. M. Beck MP | 1915 | 1919 | SAP |
| Minister of Public Works | | 1912 | 1920 | SAP |
| Minister of Railways and Harbours | | 1912 | – | SAP |