Jan Kratochvíl (born 10 February 1959) is a Czech mathematician and computer scientist whose research concerns graph theory and intersection graphs.

He studied at Charles University in Prague, earning a master's degree in 1983 and a Ph.D. in 1987;[1] his dissertation, supervised by Jaroslav Nešetřil, combined graph theory with coding theory.

[2] He remained at Charles University as a faculty member, earned his habilitation in 1995, and was promoted to full professor in 2003.

[1] Kratochvíl was the program chair and organizer of the 7th International Symposium on Graph Drawing, in 1999.

[1] Since March 2021, Kratochvíl is editor-in-chief of Elsevier's Computer Science Review (Impact Factor: 7.7), together with Giuseppe Liotta and Jaroslav Nešetřil.