Đorđe Marković Koder (Cyrillic: Ђорђе Марковић Кодер) (1806 – April 30, 1891) was a Serbian poet born in Austrian Empire. Misunderstood, largely forgotten and often considered a marginal figure in Serbian poetry, criticized for his cryptic style littered with incomprehensible words and obscure metaphors, Koder was nevertheless a unique phenomenon in the 19th century Serbian literature, sometimes cited as the first Serbian modernist.