Mjällby is a village in Sölvesborg Municipality, in Blekinge County, Sweden. Mjällby lies at 6 m above sea level. The nearest city is Kristianstad, 35 km to the west. Beaches nearby: Hällevik (4.2 km), Hörvik (2.8 km), Västra Torsö (7 km). Among the landmarks around are Stentoften Runestone (8.2 km), St. Nicholas Church (8.2 km) and Bäckaskog Castle (23 km).