| Unit Name: | 2nd Naval Brigade 2nd (Royal Naval) Brigade |
| Dates: | 2 August 1915 – 19 July 1916 |
| Country: |  United Kingdom |
| Type: | Infantry |
| Size: | Brigade of 1,500 men |
| Command Structure: | Royal Naval Division |
| Garrison: | Portsmouth Naval Base, Portsmouth |
| Garrison Label: | Brigade HQ |
| Battles: | |
| Identification Symbol Label: | Metal divisional badge |
The 2nd (Royal Naval) Brigade was an infantry brigade of the Royal Navy. It was assigned to the 63rd (Royal Naval) Division and served on the Western Front during the First World War.
The brigade was first raised in August 1914. By April 1915 it was known as 2nd (Royal Naval) Brigade. In July 1915, the Brigade was broken up, then reformed on 2 August 1915 and re-designated 2nd Brigade. It was further re-designated the 2nd (Royal Naval) Brigade and the 189th Brigade in July 1916.
The infantry battalions did not all serve at once, but all were assigned to the brigade during the war.