Marcel Thiry (Charleroi, 13 March 1897 - Vaux-sous-Chêvremont, 5 September 1977) was a French-speaking Belgian poet. During World War I, he and his brother Oscar served in the Belgian Expeditionary Corps in Russia.
He was awarded the Prix Littéraire Valery Larbaud in 1976 for Toi qui pâlis au nom de Vancouver, a book of poems reminiscent of Cendrars and Apollinaire. He is the father of virologist Lise Thiry.
- Toi qui pâlis au nom de Vancouver (1924)
- Échec au temps (1945)
- Nouvelles du grand possible (1958)
- Lettre aux jeunes Wallons (1960)
- France, Peter (Ed.) (1995). The New Oxford Companion to Literature in French. Oxford: Clarendon Press. ISBN 0-19-866125-8.