Sliač (Hungarian: Szliács) is a small spa town located in central Slovakia, on the Hron river, between Banská Bystrica and Zvolen.

The town is known for its healing hot springs and for an airport which has been used for military as well as civil purposes.

The town arose through a merger of two villages, Hájniky and Rybáre, in 1959 and was given the name "Sliač".

The Gothic church in Hájniky was mentioned for the first time in 1263 (when the territory belonged to the Kingdom of Hungary) and there is archaeological evidence of Slavic settlers living in the area since the 6th century.

Before the establishment of independent Czechoslovakia in 1918, Sliač was part of Zólyom County within the Kingdom of Hungary.