Blatno (German: Platten) is a municipality and village in Chomutov District in the Ústí nad Labem Region of the Czech Republic.

Blatno lies approximately 6 kilometres (4 mi) north-west of Chomutov, 52 km (32 mi) west of Ústí nad Labem, and 90 km (56 mi) north-west of Prague.

The Bílina River originates in the municipal territory.

Blatno consists of eight municipal parts (in brackets population according to the 2021 census):[2]

This Ústí nad Labem Region location article is a stub.