Gergely "Gergo" Kiss (born 21 September 1977) is a Hungarian water polo player who plays for Vasas SC in the Hungarian Championship.
He plays on the right side, but moves to 2-meters on offense sometimes.
He is considered to be one of the best left-handed water polo players in the world.
Kiss dominated internationally in the 2004 Olympics in Athens, especially in final match against Serbia and Montenegro.
The Hungarian team was not at its best in the first quarter, but Kiss was able to score thrice, helping them to keep up with Serbia and Montenegro.
After the Hungarian side came back to tie the game in the fourth quarter, Kiss put in the game-winning goal on a 'power play' opportunity.
He was voted to the all-star team along with teammate Tamás Kásás.