Alder (disambiguation)
Alder is the common name of Alnus, a genus of shrubs and small trees.
Alder may also refer to:
People
Places
- Alder, Colorado
 - Alder, Montana, United States
 - Alder, Washington, United States
 - Alders Brook, a small tributary of the River Roding
 - Alder Creek (disambiguation)
 - Alder River, Nova Scotia, Canada
 - Des Aulnes River (Laflamme River) (English: Alders River), Quebec, Canada
 
Other uses
- Alder (crater), lunar crater
 - Alder (Pendragon series), a fictional character in The Pendragon Adventure
 - Dwarf alder (disambiguation), common name of several plants
 - Witch alder, plants of genus Fothergilla
 - A shortened form of Aldernalisuvara, an alternative name of the Hindu deity Ardhanari particularly used by Japanese
 - Alder (Pokémon), the champion of the Unova League in Pokémon Black and White
 - Alders (surname)