Harry Frederick Houghton (7 June 1905 – 23 May 1985) was a British Naval SNCO and a spy for the Polish People's Republic and the Soviet Union during the Cold War.

After the war, he joined the civil service and in 1951 was attached to the staff of the naval attaché of the British embassy in Warsaw, Poland.

Houghton was appointed to the Admiralty Underwater Weapons Establishment, Portland, where the Royal Navy would test equipment for undersea warfare.

He persuaded Gee, apparently telling her of his connection to the Russians, to assist him in gaining access to documents for which he did not have clearance.

On the first Saturday of each month, Houghton would go to London, sometimes with Gee, and exchange packages with a contact whom they knew as Gordon Lonsdale, in reality Konon Molody, a non-official (illegal) KGB intelligence agent posing as a Canadian businessman who was the mastermind of what was to be called the Portland spy ring.

In his book Spycatcher, Peter Wright claimed that Houghton first came to MI5's attention when a Polish mole, codenamed Sniper, reported he had information about a Russian spy in the British Navy.

[2] Houghton and Gee were arrested with Lonsdale (his real identity was not yet known) by Special Branch officers on 7 January 1961 near the Old Vic theatre.

The other Soviet spies, Morris and Lona Cohen (whose cover names were Peter and Helen Kroger) were also arrested.