Dolná Seč is a municipality in Levice District, in the Nitra Region, Slovakia. Dolná Seč lies at 155 m above sea level, 13.6 km from the Štiavnica mountains. It has 566 inhabitants (2025). The nearest city is Levice, 5.6 km to the northeast. Near the border: Hungary, 24 km. Among the landmarks around are Hronský Beňadik monastery (18.8 km), Nitra Castle (39 km) and Levice Castle (5.8 km).