Dlouhá Stráň (German: Langenberg) is a small village in the Moravian-Silesian Region of the Czech Republic. It has around 80 inhabitants and lies on the shore of Slezská Harta Dam.
According to the Austrian census of 1910 the village had 264 inhabitants, 263 of whom had permanent residence there. Census asked people for their native language, 254 (96.6%) were German-speaking. Most populous religious group were Roman Catholics with 262 (99.2%).