Two submarines of the Royal Navy have borne the name HMS Astute for the characteristic of shrewdness and discernment.

HMS Astute (P447) was an Amphion-class (also known as the "A" class) submarine launched during World War II but never seeing action against an enemy.

HMS Astute (S119) was under construction in February 2003. She is the lead ship of her class of nuclear-powered attack submarines.