From the Wikipedia page 
ntil December 1, 2005, Perm Oblast (Russian: Пе́рмская о́бласть) was a federal subject of Russia (an oblast) in Privolzhsky (Volga) Federal District. According to the results of the referendum held in October 2004, Perm Oblast was merged with Komi-Permyak Autonomous Okrug to form Perm Krai.
It was established in 1938 as part of the RSFSR. From 1940 to 1957 it was named Molotov Oblast in honor of Vyacheslav Molotov.
The oblast was named after its administrative center, the city of Perm. The oblast covered an area of 160,600 km², and as of the 2002 Census its population was 2,819,421.