Nikola Grbić (Serbian Cyrillic: Никола Грбић; born September 6, 1973) is a former Serbian volleyball player, a member of Yugoslavia in 1995-2003, Serbia and Montenegro in 2003-2006 and Serbia in 2006-2010, gold medalist of the Olympic Games Sydney 2000, bronze medalist of the Olympic Games Atlanta 1996, also participant of the Olympic Games (Athens 2004, Beijing 2008), multimedalist of the World Championships, European Championships and World League, a double Italian Champion (2008, 2010), Russian Champion (2014), head coach of Serbia men's national volleyball team.
Grbić was born in Klek, SR Serbia, Socialist Federal Republic of Yugoslavia. He has older brother Vladimir, who is also former volleyball player.
He was a captain of his national team in 1999-2010. In 1996 Yugoslavia, including Grbić, won bronze medal of the Olympic Games Atlanta 1996. At the next Olympics his team achieved gold of the Olympic Games 2000 in Sydney. They beat Russia in final match (3-0).
Nikola Grbić (born 1900, date of death unknown) was a Yugoslav wrestler. He competed in the Greco-Roman middleweight event at the 1924 Summer Olympics.