The Acheron class was a class of twenty-three destroyers of the British Royal Navy, all built under the 1910–11 Programme and completed between 1911 and 1912, which served during the First World War. A further six ships were built to the same design for the Royal Australian Navy as River-class destroyers. There was considerable variation between the design and construction of ships within this class, which should be considered as more of a post-build grouping than a homogeneous class.

HMS Ariel was an Acheron-class destroyer built in 1911, which served during the First World War and sank in 1918 after striking a mine. Named after Shakespeare's "airy spirit", or the biblical spirit of the same name, she was the tenth and last ship of the name to serve in the Royal Navy.