Sir Richard John Strachan, 6th Baronet GCB (27, October 1760 – February 3, 1828) is a British officer of the Royal Navy during the French Revolutionary and Napoleonic Wars, eventually rising to the rank of admiral.

Sir Dicky, as his friends refer to him, is the last Chief of Clan Strachan.

The Baronetcy becomes dormant in 1854 as he dies without a male heir.