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Harry Nattrass (born 1898, date of death unknown) was an English football referee who hailed from Seaham, in County Durham.

He was a Football League referee from 1933 until the 1946–47 season, having actively participated as a match official during the Second World War. Perhaps his most famous match was the one between Scotland and Germany at Ibrox on Wednesday, 14 October 1936.^[2] That international signalled the arrival in Scotland of the team that represented the Nazi regime in Germany and there was concern that the game would be precipitated by demonstrations.^{[citation needed]}

Nattrass' performance in the 1936 FA Cup Final between Sheffield United and Arsenal at Wembley went without comment. The match was won by the latter, courtesy of a Ted Drake goal.^[3]

After finishing with his refereeing career Nattrass was employed by Newcastle United as a scout in the 1960s and 1970s and he 'discovered' Irving Nattrass,^[4] who was not related though sharing the same surname.^[5]