Noi (Noah) Abramovich Trotsky (Russian: Ной Абра́мович Тро́цкий; March 15, 1895 – November 19, 1940) was a Soviet architect.

Often cited for his turn from Constructivism towards Stalinist neo-Classicism in the 1930s, Trotsky's training under Fomin indicates a long familiarity with classical forms.

In March 1936, the Leningrad Soviet decided to relocate all the city's administration to a new site at the southern end of International Avenue.

It was completed after Trotsky death, with co-authors Modest Shepilevsky and Yakov Lukin, and it features an impressive 11-meter-high frieze by Soviet sculptor Nikolai Tomsky.

Trotsky taught at the Academy of Arts' successor, VKhuTeIn (ru:ВХУТЕИН, ru:Высший художественно-технический институт, Higher Institute of Arts and Design, later renamed into институт живописи, скульптуры и архитектуры (им.