Margrethe Vullum (born Lehmann; first married name Rode; 14 February 1846 – 14 August 1918) was a Danish-born Norwegian journalist, literary critic and proponent for women's rights.

She was born in Copenhagen, a daughter of statesman Orla Lehmann and his artist wife Maria Puggaard, who had died young.

[1] Vullum settled in Norway in 1879, became a journalist for the newspaper Dagbladet, and later for Verdens Gang.

She was among the principal speakers at the demonstrations in support of the Kristiania match workers' strike of 1889.

[1][2] A portrait of Vullum, painted by Oda Krohg, is located at the National Gallery of Norway.