László Fonó (born 9 April 1981) is a Hungarian former professional tennis player.

He is now a coach.

[1] Fonó, a national doubles champion, was born in Budapest and represented the Hungary Davis Cup team in a five ties during the 2003 edition.

He lost his only singles rubber to Lamine Ouahab but was unbeaten in four doubles outings.

[2] On the professional tour he attained a best singles world ranking of 608 and ranked as high as 407 in doubles.