Nikolai Aleksandrovich Shanin (Russian: Николай Александрович Шанин) (25 May 1919 Pskov – 17 September 2011) was a Russian mathematician who worked on topology and constructive mathematics. He introduced the delta-system lemma and the caliber of a topological space.

• Vsemirnov, M A, "Nikolai Aleksandrovich Shanin (on his 80th birthday)", Russian Math. Surveys, 56 (3): 601–605, doi:10.1070/RM2001v056n03ABEH000412
• Vsemirnov, M A; et al. (2013), "Nikolai Aleksandrovich Shanin (obituary)", Russ. Math. Surv., 68 (4): 763–767, doi:10.1070/RM2013v068n04ABEH004852

• Nikolai Shanin at the Mathematics Genealogy Project
• Nikolai Aleksandrovich Shanin at the Steklov Institute of Mathematics at St. Petersburg