Kostolná Ves (Hungarian: Kisegyházas) is a village and municipality in Prievidza District in the Trenčín Region of western Slovakia.
In historical records the village was first mentioned in 1332.
The municipality lies at an altitude of 360 metres and covers an area of 3.754 km². It has a population of about 467 people.
The records for genealogical research are available at the state archive "Statny Archiv in Nitra, Slovakia"
- Roman Catholic church records (births/marriages/deaths): 1790-1909 (parish A)
Coordinates: 48°48′10″N 18°29′30″E / 48.80278°N 18.49167°E