| Official Name: | Alleen Lyngdal |
| Other Name: | Alléen |
| Settlement Type: | Town |
| Pushpin Map: | Agder#Norway |
| Pushpin Label: | Alleen |
| Pushpin Label Position: | top |
| Pushpin Map Caption: | Location of the town |
| Subdivision Type: | Country |
| Subdivision Name: | Norway |
| Subdivision Name1: | Southern Norway |
| Subdivision Name2: | Agder |
| Subdivision Type3: | District |
| Subdivision Name3: | Lister |
| Subdivision Type4: | Municipality |
| Subdivision Name4: | Lyngdal |
| Established Title: | Established as |
| Established Date: | |
| Established Title1: | Town Norwegian: (By) |
| Established Date1: | 1 Jan 2001 |
| Utc Offset1: | +01:00 |
| Utc Offset1 Dst: | +02:00 |
| Area Total Km2: | 4.64 |
| Population As Of: | 2019 |
| Population Total: | 5159 |
| Population Density Km2: | 1111 |
| Postal Code Type: | Post Code |
| Postal Code: | 4580 Lyngdal |
| Elevation M: | 9 |
| Elevation Footnotes: | [1] |
| Coordinates: | 58.1375°N 7.0672°W |
Alleen or Lyngdal is a town which is the administrative centre of the municipality of Lyngdal in Agder county, Norway. It lies along the east side of the river Lygna, just north of the head of the Rosfjorden and northeast of the head of the Lyngdalsfjorden. The small villages of Skomrak and Svenevik both lie just south of the town, and the small farming area of Hæåk lies about to the northwest. On 1 January 2001, the municipal government declared the urban area of Alleen to be a town called Lyngdal. Both names are used to refer to the urban area.[2] In Norway, Alleen is considered a Norwegian: by which can be translated as either a "town" or "city" in English.
Lyngdal Church lies in the northern part of the town. The European route E39 highway and County Road 43 both pass through the town. It previously had an annual cattle auction. Alleen is the site of the largest primary and secondary schools in Lyngdal. The 4.64km2 town has a population (2019) of 5,159 and a population density of .[3]