Kvašov (Hungarian: Kvassó) is a village and municipality in Púchov District in the Trenčín Region of north-western Slovakia.

In historical records the village was first mentioned in 1471.

The municipality lies at an altitude of 252 metres and covers an area of 7.468 km². It has a population of about 660 people.

• Media related to Kvašov at Wikimedia Commons
• Official website
• Mestská obecná štatistika