Stepan Andreevich Neustroev (Russian: Степан Андреевич Неустроев; 12 August 1922 – 26 February 1998) was a Soviet officer, commander of the 1st Battalion in the 756th Regiment of the 150th Rifle Division.

Lieutenant Neustroev was dispatched to the front on November, joining the 166th Infantry Division.

At April 1943, Captain Neustroev was appointed commander of the 1st Battalion in the 756th Regiment, a post he held to the end of the war.

On 30 April, at noon, Neustroev's men stormed the Reichstag, breaking through the main entrance and clearing the building.

The following day, roughly at 03:00, his deputy for political affairs, Lieutenant Alexei Berest, together with two scouts—Mikhail Yegorov and Meliton Kantaria—raised the Victory Banner atop the Reichstag, next to Wilhelm I's statue.