Alda may refer to:

• Alda, Nebraska, a village
• Alda Township, Hall County, Nebraska

• Alda, Álava, a hamlet in Harana/Valle de Arana

• Alda (name), a given name and surname
• Alda (singer) (born 1966), Icelandic singer
• Alda Risma [id] (1982–2006), Indonesian singer

• Tropical Storm Alda, 1999
• Alda (automobile), a French automobile manufactured between 1912 and 1922
• Alda (comedy), a 12th-century elegiac comedy of William of Blois
• European Association for Local Democracy (ALDA), an international non-governmental organisation created in 1999
• Association of Late-Deafened Adults, an American organization for people who become deaf after childhood
• ALDA Events, a Dutch events management company

• Alder (disambiguation)
• Aldavilla, New South Wales