Blatnica Castle (Slovak: Blatnický hrad) is a Gothic castle whose ruins are situated near the village of Blatnica, on the foot of the Greater Fatra Range in Slovakia.

The castle was built in the 13th century to protect a major trade route running from Nitra to the north.

[2] The castle is built on typo low ridge of Plešovica which separates the Turiec Basin from the Greater Fatra Range.

It is freely accessible from the village of Blatnica by a marked footpath.

The castle remnants are hidden in a forest with limited views at the Gader Valley, which stretches underneath, and the opposite Tlstá Mountain.