Born in the village of Dilyalevo, Vologda Governorate Russian Empire as the youngest of 11 children in a peasant family, the largely self-taught Ilyushin left home at an early age. He worked as a factory laborer, ditch-digger at construction sites, and cleaner of gutters at a dye plant in Petrograd. In 1910, he learned that jobs were available at Kolomyazhsky Racetrack as a groundskeeper. The racetrack was also the site of the first All-Russia Festival of Ballooning in autumn of 1910, and Ilyushin assisted in unpacking crates and setting up equipment. He was also able to meet many of Russia's pioneer aviators, and even awoke his interest in aviation.