Kamchatka Oblast (, Kamchatskaya oblast) was, until being incorporated into Kamchatka Krai on July 1, 2007, a federal subject of Russia (an oblast). To the north, it bordered Magadan Oblast and Chukotka Autonomous Okrug. Koryak Autonomous Okrug was located in the northern part of the oblast. Including the autonomous okrug, the total area of the oblast was , encompassing the southern half of the Kamchatka Peninsula. The administrative center of Kamchatka Oblast was the city of Petropavlovsk-Kamchatsky. Population:
Kamchatka's natural resources include coal, gold, mica, pyrites, and natural gas. Most of the inhabitants live in the administrative center, Petropavlovsk-Kamchatsky. The main employment sectors are fishing, forestry, tourism (a growing industry), and the Russian military. There is still a large military presence on the peninsula; the home base of Russia's Pacific submarine fleet is across Avacha Bay from Petropavlovsk-Kamchatsky at the Rybachy base. There are also several air force bases and radar sites in Kamchatka.