Jalšové (Hungarian: Jalsó) is a village and municipality in the Hlohovec District in the Trnava Region of western Slovakia.

In historical records the village was first mentioned in 1351.

The municipality lies at an elevation of 180 metres and covers an area of 9.331 km².

The records for genealogical research are available at the state archive "Statny Archiv in Bratislava, Slovakia"

This Trnava Region geography article is a stub.