Dolný Lopašov is a village and municipality in Piešťany District in the Trnava Region of western Slovakia.
In historical records the village was first mentioned in 1394.
The municipality lies at an altitude of 207 metres and covers an area of 22.934 km². It has a population of about 979 people.
The records for genealogical research are available at the state archive "Statny Archiv in Bratislava, Slovakia"
- Roman Catholic church records (births/marriages/deaths): 1698-1897 (parish A)
Coordinates: 48°35′N 17°39′E / 48.583°N 17.650°E