Nová Dedinka (Hungarian: Dunaújfalu) is a village and municipality in western Slovakia in Senec District in the Bratislava Region.
In historical records the village was first mentioned in 1252.
The municipality lies at an altitude of 130 metres and covers an area of 10.242km². It has a population of 1751 people.
Coordinates: 48°11′17″N 17°21′31″E / 48.18806°N 17.35861°E