Oliver Gatty (5 November 1907 – 5 June 1940) was a British chemist and psychical researcher.

He worked at Rothamsted Experimental Station and then under Eric Rideal, Professor of Colloid Science at University of Cambridge.

In 1938, he examined ten cases and concluded that "all the reliable experimental evidence shows that dowsers cannot find hidden things by means other than the use of their five senses.

"[4] He died in Cambridge on 5 June 1940 as a result of injuries sustained in a gas explosion accident.

Their only child, Tirril Olivia, was born in July 1940, a month after Gatty's death.