HMS Inconstant was an Arethusa-class light cruiser. She was built for the Royal Navy by William Beardmore and Company and launched on 6th July 1914.

The Inconstant had an overall length of 436ft and a displacement of 3,750 tons and was designed to operate with destroyers in the North Sea. She took part in the Battle of Jutland on 31st May 1916. The Inconstant was finally sold for scrap in June 1922.