Serge Gumienny (born 14 April 1972 in Sint-Truiden) is a former Belgian football referee. He frequently operates in the Belgian First Division, Belgian Second Division and Belgian Cup. Occasionally he referees a matches in the Dutch Eredivisie, the UEFA Intertoto Cup, the UEFA Europa League and the UEFA Champions League. He also has whistled matches overseas and frequently operates as fourth official in the games refereed by Frank De Bleeckere. On 25 December 2008, he was promoted to the European A-category (Elite development). He has whistled 250 games in the Belgian first division.