| Cabinet Name: | Lang ministry |
| Cabinet Number: | 42nd |
| Jurisdiction: | the State of New South Wales |
| Flag Border: | true |
| Government Head: | Jack Lang |
| State Head: | George V |
| State Head Title: | Monarch |
| Members Number: | 16 |
| Legislature Status: | Majority government |
| Opposition Leader: | Thomas Bavin |
| Election: | 1925 New South Wales election |
| Previous: | Second Fuller ministry |
| Successor: | Lang ministry (1927) |
The Lang ministry (1925–1927) or First Lang ministry was the 42nd ministry of the New South Wales Government, and was led by the 23rd Premier, Jack Lang. This ministry was the first of three ministries under Lang as Premier.
Lang was first elected to the New South Wales Legislative Assembly in 1913 and served continuously until 1946. In 1923 Lang was elected NSW Parliamentary Leader of the Labor Party by the Labor caucus, and became Opposition Leader in 1923. At the 1925 state election, Lang led Labor to victory, defeating the Nationalist Party led by Sir George Fuller.
The ministry covers the period from 17 June 1925 until 26 May 1927 when Lang was confronted with extended cabinet strife, centred on Albert Willis. Lang gained the approval of the Governor to reconstruct the ministry subject to an early election, held in October 1927.
The composition of the ministry was announced by Premier Lang on 17 June 1925 and covers the period up to 26 May 1927.
| Portfolio | Minister | Party | Term commence | Term end | Term of office | |
|---|---|---|---|---|---|---|
| 17 June 1925 | 26 May 1927 | |||||
| Secretary for Lands Minister for Forests | 25 November 1926 | |||||
| 17 June 1925 | 19 November 1926 | |||||
| Secretary for Mines Minister for Labour and Industry | 26 May 1927 | |||||
| Attorney General | ||||||
| Minister for Agriculture | ||||||
| Assistant Secretary for Lands Assistant Minister for Forests | 25 November 1926 | |||||
| Minister of Justice Assistant Treasurer | 17 June 1925 | |||||
| Minister for Education | ||||||
| Chief Secretary | ||||||
| Minister for Public Health | ||||||
| Minister for Local Government | 24 March 1926 | |||||
| 25 March 1926 | 26 May 1927 | |||||
| Assistant Minister for Local Government | 17 June 1925 | 24 March 1926 | ||||
| Assistant Minister for Public Health | ||||||
| Secretary for Public Works Minister for Railways | 26 May 1927 | |||||
| Minister without portfolio | , MLC | |||||
| Vice-president of the Executive Council Representative of the Government in Legislative Council | , MLC | |||||