Demeter Koko was born on June 13, 1891 in Linz. He received his education from Bertha von Tarnoczy in Linz and from Henry von Zügeln in Munich. His studies took him to Hungary, Transylvania, Styria, Salzkammergut, and Italy. The also graphically working Koko has been awarded 30 years with the Austrian State Prize. His paintings are in Nordico and in Upper Austria as well as, in the Landesmuseum in Linz and the Landesmuseum in Graz. Koko was a member of the artists' association "March." – Linz.
Demeter Koko died on the 27th of October 1929 in Linz.