Blatná is a town in Strakonice District in the South Bohemian Region of the Czech Republic. It has about 6,600 inhabitants. It is known for a wate…Blatná is a town in Strakonice District in the South Bohemian Region of the Czech Republic. It has about 6,600 inhabitants. It is known for a water castle in the centre of a pond, and a landscape garden around it. The historic town centre with the castle complex is well preserved and is protected by law as an urban monument zone.