Hildur Andersen (25 May 1864 – 20 December 1956) was a Norwegian pianist and music pedagogue.

She was born in Christiania to stadsingeniør Oluf Martin Andersen and Annette Fredrikke Sontum, and was a sister of geographer Aksel Arstal.

She made her consert debut in Kristiania in 1886.

She had a close friendship with playwright Henrik Ibsen, and is regarded to be the model for the character "Hilde Wangel" in Ibsen's play The Master Builder.

She was awarded the King's Medal of Merit in gold in 1924.