Ádám Madarassy (born March 14, 1985 in Budapest) is a Hungarian swimmer, who specialized in butterfly events.
Madarassy is a member of the swimming team for Louisville Cardinals, and also, a management graduate at the University of Louisville in Louisville, Kentucky.
Madarassy competed for Hungary in the men's 100 m butterfly at the 2008 Summer Olympics in Beijing.
Leading up to the Games, he registered a time of 54.28 to eclipse the FINA B-cut (54.70) by 0.42 of a second at the USA Swimming Grand Prix in Columbus, Ohio.
Madarassy threw down his lifetime best of 53.93 to hit the wall with a fourth-place finish in heat three, trailing winner Rimvydas Šalcius of Lithuania by just more than a second.
Madarassy failed to advance into the semifinals, as he placed fiftieth out of 66 swimmers in the prelims.