Gyula Y. Katona (December 4, 1965 - ) is a Hungarian mathematician, the son of mathematician Gyula O. H. Katona. He received his Ph.D. in 1997 from Hungarian Academy of Sciences, with a dissertation entitled Paths and Cycles in Graphs and Hypergraphs under the advisement of László Lovász and András Recski, and as of 2009[update] is on the faculty of the Budapest University of Technology and Economics.
Katona is the coauthor of three textbooks, Introduction to Computer Science (Typotex, Budapest, 2002), Introduction to Finite Mathematics, (Eötvös L. University, Budapest, 1993), and Combinatorics, Graph Theory and Algorithms (Technical University of Budapest, 1993). In addition his research publications include several works on Hamiltonian cycles and related properties of graphs.