| Official Name: | Lagan |
| Pushpin Map: | Sweden Kronoberg#Sweden |
| Subdivision Type: | Country |
| Subdivision Name: | Sweden |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Ljungby Municipality |
| Subdivision Type2: | County |
| Subdivision Name2: | Kronoberg County |
| Subdivision Type1: | Province |
| Subdivision Name1: | Småland |
| Area Footnotes: | [1] |
| Area Total Km2: | 2.73 |
| Population As Of: | 31 December 2010 |
| Population Total: | 1,744 |
| Population Density Km2: | 639 |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Coordinates: | 56.9167°N 72°W |
Lagan is the second largest locality situated in Ljungby Municipality, Kronoberg County, Sweden, with 1,744 inhabitants in 2010. It is at an altitude of 139 meters (459 feet). It has got its name from the river Lagan, which passes nearby.