Chlum u Třeboně (German: Chlumetz) is a market town in Jindřichův Hradec District in the South Bohemian Region of the Czech Republic.

Chlum u Třeboně consists of four municipal parts (in brackets population according to the 2021 census):[2] Chlum u Třeboně is located about 20 kilometres (12 mi) south of Jindřichův Hradec and 33 km (21 mi) east of České Budějovice.

It lies mostly in the Třeboň Basin, only a small part of the municipal territory in the east extends into the Javořice Highlands.

Hejtman was founded in 1554 and in addition to fish farming, it is used for water sports and recreation.

During their rule, establishment of fishponds in the area began and a fortress in Chlum was built.

[6] The next notable owners of Chlum were the Slavata family (1615–1693) and the Counts of Fünfkirchen (1693–1834).

He had stopped all the industrial activity in the market town, had rebuilt the local castle into its present form and used it as a summer residence.