Seč is a municipality in Prievidza District, in the Trenčín Region, Slovakia. Seč lies at 446 m above sea level, in the Strážov mountains. It has 392 inhabitants (2025). The nearest city is Prievidza, 10.3 km to the east. Among the landmarks around are Trenčín Castle (35 km), Holy Trinity church in Prievidza (10.2 km) and St. Bartholomew church (10.4 km). Among the natural features are Linden Tree of King Matthias (7.0 km) and Prepostska jaskyna (7.6 km).