Johan Anthon Abraham Fjeldsted Dahl (1 January 1807 – 16 March 1877) was a Norwegian bookseller and publisher, born in Copenhagen.
Dahl was born in Copenhagen as the son of shoemaker John Dahl and Anne Kirstine Willumsen. He was married to singer and music teacher Emma Amalie Charlotte Freyse (1819–1896).
Dahl started working for Gyldendalske Boghandel in Copenhagen from he was 15 years old. In 1829 he moved to Christiania in Norway to help with Jørgen Wright Cappelen's new bookstore. In 1832 he established his own bookstore in Christiania, which came to be an important meeting place for the literary and cultural elite in the 1830s and 1840s. He also established a publishing house. Among his published books were Amtmandens Døttre by Camilla Collett, Synnøve Solbakken by Bjørnstjerne Bjørnson, and Kongs-Emnerne by Henrik Ibsen. A controversy occurred in 1836, when Dahl published Andreas Munch's poetry collection Ephemerer. The police demanded that the book should be censored before its publication, while Dahl, in opposition to censorship, refused. The case eventually ended in a victory for Dahl in the Supreme Court.
Dahl founded the newspaper Den Constitutionelle in 1836, with assistance from Ulrik Anton Motzfeldt and Carl Andreas Fougstad. He was a co-founder of the gallery Christiania Kunstforening in 1836, along with Johan Sebastian Welhaven, Frederik Stang and Henrik Heftye.