Blatno () is a municipality and village in Louny District in the ÃÂstÃÂ nad Labem Region of the Czech Republic. It has about 500 inhabitants.
Blatno lies approximately south-west of Louny, south-west of ÃÂstÃÂ nad Labem, and west of Prague.
Blatno consists of two municipal parts (in brackets population according to the 2021 census):