Neoromantic poet called by some the greatest Icelandic poet of the 20th century.

Benediktsson's father was a leader of the Icelandic independence movement, and his mother was a poet. He received a law degree at Copenhagen in 1892 and briefly edited a Reykjavík newspaper, Dagskrá (1896–98), advocating the cause of Icelandic independence. Much of his life was spent abroad, raising capital to develop Icelandic industries. His five volumes of Symbolist verse—Sögur og kvaedi (1897; “Stories and Poems”), Hafblik (1906; “Smooth Seas”), Hrannir (1913; “Waves”), Vogar (1921; “Billows”), Hvammar (1930; “Grass Hollows”)—show a masterful command of the language and the influence of his extensive travels, and they exemplify his patriotism, mysticism, and love of nature. A speculative citizen of the world, he wrote in an ornate style and, as one critic said, delighted in mirroring the macrocosm in a microcosm. Benediktsson translated Henrik Ibsen's Peer Gynt into Icelandic. A selection of his poems was translated into English as Harp of the North (1955) by Frederic T. Wood.