Following World War II, at the insistence of Joseph Stalin during the Tehran Conference of 1943, Poland's borders were redrawn, Polish population forcibly resettled and Stanisławów Voivodeship was incorporated into the Ukrainian Soviet Socialist Republic as Stanislav Oblast (later renamed as Ivano-Frankivsk Oblast).

As bulk of the Polish Army was concentrated in the west, fighting Germans, the Soviets met with little resistance and their troops quickly moved westwards.

It is estimated that prior to Soviet counter-offensive in the latter part of World War II, over 18,000 Polish civilians in Stanisławów Voivodeship fell victims to OUN-UPA massacres.

According to the census of 1921 the Stanisławów Voivodeship was inhabited by 1,339,191 people, of whom by nationality 70.2% were Ruthenian (Ukrainian), 21.8% were Polish, 6.8% were Jewish, 1.1% were German and 0.1% all others.

The results of the 1931 census (questions about mother tongue and about religion) are presented in the table below: The Stanisławów Voivodeship's area was 16,894 square kilometers.

The landscape was hilly (in the north) and mountainous (in the south), with Hoverla in the Chornohora range as the highest peak (2060 meters above sea level).

Before the onset of World War II the Stanisławów Voivodeship consisted of 15 powiats (counties) (earlier 12), 29 towns, 904 villages and numerous smaller communities (futory, kolonie).

The local government of voivodeship and city was located at address Ulica Karpinskiego, 7 (today - vulytsia Halytska, 2).

On 6 October 1939 – 27 November 1939 the voivodeship was governed by Soviet provisional chairman of Civilian Administration Mikhail Grulenko who later continued to hold his post as the 1st secretary of the CPU in the region.