Častkovce (Hungarian: Császtó, German: Czastkowitz) is a village and municipality in Nové Mesto nad Váhom District in the Trenčín Region of western Slovakia.

Before the establishment of independent Czechoslovakia in 1918, Častkovce was part of Nyitra County within the Kingdom of Hungary.

The municipality lies at an altitude of 178 metres and covers an area of 7.541 km².

The records for genealogical research are available at the state archive "Statny Archiv in Bratislava, Slovakia" Media related to Častkovce at Wikimedia Commons

This Trenčín District location article is a stub.