| Official Name: | Kosta |
| Pushpin Map: | Sweden Kronoberg#Sweden |
| Subdivision Type: | Country |
| Subdivision Name: | Sweden |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Lessebo Municipality |
| Subdivision Type2: | County |
| Subdivision Name2: | Kronoberg County |
| Subdivision Type1: | Province |
| Subdivision Name1: | Småland |
| Area Footnotes: | [1] |
| Area Total Km2: | 1.62 |
| Population As Of: | 31 December 2010 |
| Population Total: | 884 |
| Population Density Km2: | 547 |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Coordinates: | 56.85°N 38°W |
Kosta (pronounced as /sv/)[2] is a locality situated in Lessebo Municipality, Kronoberg County, Sweden with 884 inhabitants in 2010.
It is located between the cities of Kalmar and Växjö, in the forested Småland province.
Kosta is known for the glassworks, Kosta Boda.