Kostolná-Záriečie (Hungarian: Vágegyháza-Alsózáros) is a village and municipality in Trenčín District in the Trenčín Region of north-western Slovakia.
In historical records the village was first mentioned in 1318.
The municipality lies at an altitude of 206 metres and covers an area of 3.666 km2.
The records for genealogical research are available at the state archive "Statny Archiv in Bratislava, Slovakia"
This Trenčín District location article is a stub.