Soľnička is a municipality in Trebišov District, in the Košice Region, Slovakia. Soľnička lies at 105 m above sea level. It has 247 inhabitants (2025). The nearest city is Trebišov, 25 km to the northwest. Near the border: Hungary, 10 km. Among the landmarks around are Premonstratensian monastery (5.0 km), Uzhhorod Castle (30 km) and Stonebridge in Leles (4.3 km).