Šupljak (Serbian Cyrillic: Шупљак, Hungarian: Ludas) is a village in Serbia. It is situated in the Subotica municipality, in the North Bačka District, Vojvodina province. The village has a Hungarian ethnic majority and its population numbering 1,310 people (2002 census).

• History of Šupljak

• List of places in Serbia
• List of cities, towns and villages in Vojvodina