Rear Admiral Iain Robert Henderson, CB, CBE, DL (born 1 April 1948) is a retired senior Royal Navy officer.

[2] Henderson joined the Royal Navy and trained as a helicopter and fast jet pilot, including a secondment to the RAF where he flew McDonnell Douglas Phantom interceptors out of RAF Leuchars.

[3] Henderson became Flag Officer, Naval Air Command in 1998 before retiring in 2001.

His final duty as Gentleman Usher of the Scarlet Rod occurred in May 2006, during that year's Installation of Knights.

[11] He served as Vice Lord-Lieutenant of Hampshire between 2018 and 2023, until he reached the mandatory retirement age of 75.