Prosiek (Hungarian: Prószék) 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 1280. 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 municipality lies at an altitude of 600 metres and covers an area of 12.674 km². It has a population of about 192 people.

• http://www.statistics.sk/mosmis/eng/run.html

49°09′N 19°30′E / 49.150°N 19.500°E / 49.150; 19.500