| Cabinet Name: | Hanson ministry |
| Cabinet Number: | 4th |
| Jurisdiction: | the Colony of South Australia |
| Flag Border: | true |
| State Head Title: | Monarch |
| Government Head Title: | Premier |
| Government Head: | Richard Hanson |
| State Head: | Queen Victoria |
| Governor: | Sir Richard MacDonnell |
| Members Number: | 6 |
| Political Party: | unaligned |
| Legislature Status: | Minority Government |
| Opposition Party: | unaligned |
| Previous: | Torrens Ministry |
| Successor: | Reynolds Ministry I |
The Hanson Ministry was the 4th Ministry of the Government of South Australia, led by Premier Richard Hanson. It commenced on 30 September 1857 with the defeat of the Torrens Ministry on the floor of the House of Assembly. Hanson's government was the longest lasting at this point, surviving until 9 May 1860, a total of . It fell after losing a confidence vote, and was replaced by Thomas Reynolds' First Ministry.[1]
Hanson's Ministry was the first in South Australia to include a former Premier, Boyle Finniss.
| Portfolio | Minister | Term commence | Term end | Term of office |
|---|---|---|---|---|
| Premier Attorney-General | Hon. Richard Hanson MHA | 30 September 1857 | 9 May 1860 | days |
| Chief Secretary | Hon. William Younghusband MLC | |||
| Colonial Treasurer | Hon. Capt. John Hart MHA | 12 June 1858 | days | |
| Hon. Boyle Finniss MHA | 12 June 1858 | 9 May 1860 | days | |
| Commissioner of Crown Lands and Immigration | Hon. Francis Dutton MHA | 30 September 1857 | 2 June 1859 | days |
| Hon. John Neales MHA | 2 June 1859 | 5 July 1859 | days | |
| Hon. William Milne MHA | 5 July 1859 | 9 May 1860 | days | |
| Commissioner of Public Works | Hon. Thomas Reynolds MHA | 30 September 1857 | 12 June 1858 | days |
| Hon. Arthur Blyth MHA | 12 June 1858 | 9 May 1860 | days |