| Košariská | |
| Settlement Type: | Village |
| Subdivision Type: | Country |
| Subdivision Name: | Slovakia |
| Subdivision Type2: | Region |
| Subdivision Name2: | Trenčín |
| Subdivision Type3: | District |
| Subdivision Name3: | Myjava |
| Pushpin Map: | Slovakia Trenčín Region#Slovakia |
| Pushpin Relief: | 1 |
| Pushpin Map Caption: | Location of Košariská in the Trenčín Region |
| Coordinates: | 48.6775°N 17.5958°W |
| Established Title: | First mentioned |
| Established Date: | 1786 |
| Area Total Km2: | 11.52[1] |
| Area Total Sq Mi: | 4.45 |
| Elevation M: | 328[2] |
| Elevation Ft: | 1,076 |
| Population Total: | 416[3] |
| Population Density Km2: | 36.05[4] |
| Population Density Sq Mi: | 13.92 |
| Postal Code Type: | Postal code |
| Postal Code: | 906 15 |
| Area Code: | +421 34 |
| Blank Name: | Car plate |
| Blank Info: | MY |
| Website: | www.kosariska.sk |
Košariská (in Slovak pronounced as /ˈkɔʂariskaː/; Hungarian: Kosaras) is a village and municipality in Myjava District in the Trenčín Region of north-western Slovakia.
In historical records the village was first mentioned in 1786. Before the establishment of independent Czechoslovakia in 1918, it was part of Nyitra County within the Kingdom of Hungary. From 1939 to 1945, it was part of the Slovak Republic.
The municipality lies at an altitude of 249 metres and covers an area of 11.531 km2. It has a population of about 403 people.
The records for genealogical research are available at the state archive "Statny Archiv in Bratislava, Slovakia"