Nicolaas ("Nico") Hessel Rienks (born 1 February 1962) is a former rower from the Netherlands and two-time Olympic gold medallist.Rienks won the gold medal in the men's double sculls at the 1988 Summer Olympics, alongside Ronald Florijn. At the 1996 Summer Olympics, he repeated his gold medal performance winning the eight with coxswain event with the Holland Acht (Holland Eight).