Emil Christian Hansen (8 May 1842 – 27 August 1909) was a Danish mycologist and fermentation physiologist.

[1] Between 1874 and 1875 he edited and distributed an mycological exsiccata work, namely Fungorum fimicolorum exempl.

[2] He was awarded a gold medal in 1876 for an essay on fungi, titled De danske Gjødningssvampe.

[3] During his days as a university student in Copenhagen, he worked as an unpaid assistant to zoologist Japetus Steenstrup (1813–1897).

In 1876, with Alfred Jørgensen (1848–1925), he published a Danish translation of Charles Darwin’s "The Voyage of the Beagle"; Rejse om Jorden.