Dolní Datyněⓘ (Polish: Datynie Dolneⓘ, German: Nieder Dattin) is a village in Karviná District, Moravian-Silesian Region, Czech Republic.
Following the Munich Agreement, in October 1938 together with the Zaolzie region it was annexed by Poland, administratively adjoined to Cieszyn County of Silesian Voivodeship.
The first school, which conducted classes in both Polish and German, was built in the 19th century; it is not clear in what year it was completed.
The Polish school was closed several years after World War II due to lack of children.
The most notable landmark in the village is the Protestant chapel, built in 1886 by Józef Prymus and Jan Kołorz.