Agda may refer to: Agda (programming language), the programming language and theorem prover Agda (Golgafrinchan), the character in The Hitchhiker's Guide to the Galaxy by Douglas Adams Liten Agda, the heroine of a Swedish legend Agda Montelius, a Swedish feminist Agda Persdotter, a Swedish royal mistress of the 16th-century Agda Rössel, a Swedish politician Agda Östlund, a Swedish politician