The 2018 Gazprom Hungarian Open was a men's tennis tournament played on outdoor clay courts.

It was the 2nd edition of the Hungarian Open, and part of the ATP World Tour 250 series of the 2018 ATP World Tour.

It took place at Nemzeti Edzés Központ in Budapest, Hungary, from April 23–29.

The following players received wildcards into the singles main draw: The following players received entry from the qualifying draw: The following players received entry as lucky losers: The following pairs received wildcards into the doubles main draw: