Hamr is a municipality and village in Jindřichův Hradec District in the South Bohemian Region of the Czech Republic. It has about 400 inhabitant…Hamr is a municipality and village in Jindřichův Hradec District in the South Bohemian Region of the Czech Republic. It has about 400 inhabitants. Hamr lies approximately 24 kilometres south of Jindřichův Hradec, 32 km east of České Budějovice, and 131 km south of Prague.