Závažná Poruba (Hungarian: Németporuba) is a village and municipality in Liptovský Mikuláš District in the Žilina Region of northern Slovakia.
In historical records the village was first mentioned in 1263. Before the establishment of independent Czechoslovakia in 1918, it was part of Liptó County within the Kingdom of Hungary. From 1939 to 1945, it was part of the Slovak Republic.
The Slovak poet Milan Rufus was born in the village in 1928.[1]
The municipality lies at an altitude of 634 metres and covers an area of 18.664 km². It has a population of about 1231 people.