Koš (German: Andreasdorf, Hungarian: Kós) is a village and municipality in Prievidza District in the Trenčín Region of western Slovakia.

Slovak kôš, koš - a basket, but also a knitted fence. Kos (1408).

In historical records the village was first mentioned in 1367.

The municipality lies at an altitude of 270 metres and covers an area of 13.586 km². It has a population of about 900 people.

The records for genealogical research are available at the state archive "Statny Archiv in Nitra, Slovakia"

• Roman Catholic church records (births/marriages/deaths): 1691-1906 (parish A)

• List of municipalities and towns in Slovakia

• Media related to Koš at Wikimedia Commons
• Official website
• https://web.archive.org/web/20090412234949/http://www.statistics.sk/mosmis/eng/run.html
• Surnames of living people in Kos