Ignacy Fik (4 April 1904 – 26 November 1942) was a Polish poet, essayist, literary critic and political activist.

Imprisoned for several months in 1925 for his political activities, he worked mostly as a teacher, while contributing literary criticism to leftist magazines such as Nasz Wyraz and Sygnały.

He was the author of several books of poetry, including Kłamstwa lustra (1931) and Plakaty na murze (1936), of essays such as "Uwagi nad językiem Cypriana Norwida" ("Notes on the language of Cyprian Norwid", 1930), and of the critical survey Dwadzieścia lat literatury polskiej ("Twenty years of Polish literature", 1939).

His outlook was Marxist and in the essay "Literatura choromaniaków" (1935) he condemned the work of Bruno Schulz and Witold Gombrowicz as degenerate.

Upon the German invasion he founded the Communist group "R" (Rewolucja) with his wife Helena Moskwianka and edited underground magazines.