|Intercommunality||Communauté de communes de la Vallée d'Ossau|
|Elevation||304–510 m (997–1,670 ft)
(avg. 424 m or 1,391 ft)
|Land area1||15.40 km2 (5.95 sq mi)|
|- Density||23 /km2 (60 /sq mi)|
|INSEE/Postal code||64363/ 64260|
|1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km² (0.386 sq mi or 247 acres) and river estuaries.|
|2 Population without double counting: residents of multiple communes (e.g., students and military personnel) only counted once.|
|This article may be expanded with text translated from the corresponding article in the French Wikipedia. (December 2008)|
The town is bisected by a tributary of the Gave de Pau, the Luz Creek (15.2 km in France) and its tributaries:
- The Gest Brook (14.8 km in France) and its tributary:
- The Herran stream
- The Luz de Casalis brook
A tributary of the Beez (which in itself is a tributary of the Gave de Pau) also runs through the town: the Landistou Creek (12.5 km in France) and its tributaries:
- The Betbeder stream
- The Bonnasserre stream
- The Chourrup stream
- The Lazerau stream
- The Lespereu stream
The town is also traversed by the stream of the Fountain Mesplé, and its tributary, the stream of Subercase.
Localities and Hamlets 
- lou Boscq
- Vic de Hoges de Baix
- Vic de Hoges de Haut
- Vic de Lis de Baix
- Vic de Lis de Haut
Surrounding Communities 
- Sévignacq-Meyracq to the north
- Haut-de-Bosdarros to the northeast
- Bruges-Capbis-Mifaget to the east
- Sainte-Colome to the southwest
- Louvie-Juzon to the south
The name Lys appears as Lis-Sainte-Colomme (Lily Saint Colomme) from the 1721 census. The name comes from Gascony, and means 'flat land'.
Lys was formerly an annex of Sainte-Colome until it acquired municipality status on January 2, 1858.
Francis Laur has served as mayor since 1995, and is currently serving his third term, which will last until 2014.
The town is part of six intercommunal structures:
- Communauté de communes de la Vallée d'Ossau (The Municipality of the Ossau Valley)
- Syndicat de la perception d'Arudy
- Municipal association for the management of the Beez and Ouzom watersheds.
- Municipal association for the construction of the CES of Nay
- Ossau Valley water union
- Lower Ossau electric union
The town's economy is primarily oriented toward agriculture and livestock (sheep, cattle, pigs, mules).