Dubník (Csúz) is a municipality and village in the Nové Zámky District in the Nitra Region of south-west Slovakia. In historical records the village was first mentioned in 1236. The village lies at an altitude of 146 metres and covers an area of 41.006 km2. It has a population of about 1,765 people. The population is about 65% Hungarian and 35% Slovak. The village has a public library and a football pitch.