Brigadier Ronald Henry Senior, DSO & Bar, TD (3 July 1904 – 2 March 1988) was a British Army officer who served with distinction in various campaigns throughout the Second World War.

In April 1940 Senior, who was by now officer commanding D Company, was sent to France with his battalion to reinforce the British Expeditionary Force (BEF).

As part of the 131st Infantry Brigade of the 44th (Home Counties) Division, the battalion was not to stay in France long as the Battle of France began just a few weeks later, which resulted in the BEF being almost surrounded by the superior German Wehrmacht forces and the BEF having to retreat to the port of Dunkirk, from where they were evacuated to England.

[1] The brigade had also seen service in Africa and soon fought in the Allied invasion of Sicily from July–August 1943, and was eventually returned to the United Kingdom towards the end of 1943.

Senior was wounded in action soon after, however, and he spent the next few months recovering from his injuries before taking command of the 49th Division's 56th Infantry Brigade in late January 1945.