Nová Bošáca (Slovak pronunciation: [ˈnɔʋaː ˈbɔʂaːtsa]; Hungarian: Újbosác) is a village and municipality in Nové Mesto nad Váhom District in the Trenčín Region of western Slovakia.

In the 18th century, Bošácke kopanice (the current village of Nová Bošáca) was one of the largest dispersed settlements in this area.

According to the Ethnographic Atlas of Slovakia, Nová Bošáca is located in the western Slovak lowland area with mountainous elements.

Before the establishment of independent Czechoslovakia in 1918, the territory of Nová Bošáca was part of Trencsén County within the Kingdom of Hungary.

In Slovakia, it borders with the municipalities of Chocholná-Velčice, Haluzice, Bošáca, Zemianske Podhradie and Moravské Liesköve.