Tom Ongena (Dutch pronunciation: [tɔm ˈɔŋɣənaː]; born 20 September 1975) is a Belgian politician for the Open Vld born in Germany and has served as chairman of the party since 2023.

Ongena was born in Cologne, Germany in 1975 before moving to Belgium as a teenager.

[2][3] In July 2023, he was appointed as temporary chairman of the Open VLD party at the recommendation of Alexander De Croo after Egbert Lachaert resigned as chairman a few days earlier.

The election was seen as controversial as the Open VLD's leadership process did not take place via a direct vote which had been how previous chairmen were elected where members could also cast their votes digitally or by letter, but via a vote that required physical presence at the Open VLD party congress and for which an amendment to the articles of association was approved at the same congress.

[5] After the 2024 Belgian federal election, Ogena announced his resignation on June 9, 2024.