Rear Admiral Ridley McLean, USN (10 November 1872 – 12 November 1933) was a two-star Admiral in the United States Navy. He was a Naval Academy graduate, the original author of the Navy's Bluejacket's Manual, and Judge Advocate General (JAG). He commanded a battleship in World War I, helped pioneer the naval use of shortwave communication, and led a submarine force and a battleship division.