Dolná Seč ( Hungarian: Alsószecse) is a village and municipality in the Levice District in the Nitra Region of Slovakia.
In historical records the village was first mentioned in 1310.
The village lies at an altitude of 155 metres and covers an area of 8.78 km². It has a population of about 445 people.
The village is about 85% Slovak, 7% Magyar and 7% Gypsy.
The village has a public library and a football pitch.
The records for genealogical research are available at the state archive "Statny Archiv in Nitra, Slovakia"
48°10′N 18°34′E / 48.167°N 18.567°E