Admiral John Evans (1717 – 8 July 1794) was a Royal Navy officer.

Evans joined the Royal Navy in 1731.

[1] Promoted to captain on 20 April 1748, he was given command of the post ship HMS Flamborough on promotion, the sixth-rate HMS Squirrel later in the year and the sixth-rate HMS Glasgow later still in the year.

[1] He went on to take command of the sixth-rate HMS Experiment in December 1753, the fifth-rate HMS Prince Edward in July 1755 and the fourth-rate HMS Preston in January 1757 as well as the third-rate HMS Augusta in 1767.

[2] Promoted to rear-admiral on 29 March 1779 and to vice-admiral on 26 September 1780, he became acting commander-in-chief the Downs in 1780 before being promoted to full admiral on 1 February 1793.