Dolní Datyně is a place, that after the Treaty of Saint-Germain belonged to Czechoslovakia and was situated in the administrative region Český Těšín.
Dolní Datyně was formerly part of the German Empire. In the German Empire, the place was called Nieder Dattin. The place is now called Dolní Datyně (Havířov-Dolní Datyně) and belongs to Czech Republic.