Oskar Maria Graf (22 July 1894 – 28 June 1967) was a German-American writer who wrote several narratives about life in Bavaria, mostly autobiographical.

Graf was born in Berg in the Kingdom of Bavaria, situated in the picturesque landscape around Lake Starnberg near Munich.

He was the ninth child of baker Max Graf and his wife Therese (née Heimrath), a farmer's daughter.

In 1911, hoping to earn a living as a poet, he fled to Munich to escape his brother who treated him badly, sometimes resorting to violence towards his family members.

In 1920, he was active as a dramaturg at the working-class theater Die neue Bühne ("The new stage"), until he achieved literary fame in 1927 with his memoir Wir sind Gefangene (Prisoners All), which allowed him to make a living as a freelance writer.

In 1942, together with Wieland Herzfelde and other German writers in exile, he founded the German-language publishing house Aurora-Verlag in New York, which was later considered as the successor to Malik-Verlag.

In 1960, he was awarded an honorary doctoral degree by Detroit's Wayne State University, "in recognition of his uncompromising intellectual attitude".

There is an upper secondary school (Gymnasium) in Neufahrn bei Freising, north of Munich, that is named in honor of Oskar Maria Graf.