Piotr Smoleński (died 9 January 1942) was a cryptologist in the Russian section (B.S.-3) of the interbellum Polish General Staff's Cipher Bureau.

With other cryptologists, including Jan Graliński, he died in the sinking of the passenger ship SS Lamoricière in the Mediterranean Sea.

• Sánchez Muñoz, José Manuel (2013), "Criptología Nazi: Los Códigos Secretos de Hitler" (PDF), Pensamiento Matemático (in Spanish), 3 (1): 59–119. See in particular p. 106.