By the early 1940s, the oblast became one of the most industrialized regions of Russia, its biggest economic centers were Yaroslavl (53% of the industrial output), Rybinsk (17%) and Kostroma (11%).
Ved begyndelsen af 1940'erne var oblasten af de mest industrialiserede regioner i Rusland, de største økonomiske centre var Jaroslavl (53% af industriproduktionen), Rybinsk (17%) og Kostroma (11%).