Leonardus "Leon" Fransiscus Emanuel Kantelberg (born 15 July 1978) is a Dutch former professional footballer who played as a midfielder.
Kantelberg was born in Eindhoven, Netherlands. He had a trial with Valletta FC in June 2009. Before joining Valletta on trial he used to play for Eredivisie team VVV-Venlo.
Kantelberg appeared for the Netherlands Antilles national team in qualifying matches for the 2006 and 2010 FIFA World Cup.