Primorsky Krai (Russian: Примо́рский край, tr. Primorsky kray; IPA: [prʲɪˈmorskʲɪj kraj]), informally known as Primorye (Примо́рье, IPA: [prʲɪˈmorʲjɪ]), is the Russian name for a province of Russia. Primorsky means "maritime" in Russian, so in English translation it is known as the Maritime Province or Maritime Territory. Its administrative center is in the city of Vladivostok. The region's population is 1,956,497 (2010 Census). Today, Primorsky Krai has the largest economy in the Russian Far East.

Primorsky Krai, bordered by China, North Korea, and the relatively warm—although freezing in winter—waters of the Sea of Japan, is the southeasternmost region of Russia, located between the 42° and 48° north latitude and 130° and 139° east longitude. It is stretched in the meridianal direction, the distance from its extreme northern point to its most southerly point being about 900 kilometers (560 mi).

Highlands dominate the territory of the krai. Most of the territory is mountainous, and almost 80% of it is forested. The average elevation is about 500 meters (1,600 ft). Sikhote-Alin is a mountainous formation, extending for the most part of the Krai. It consists of a number of parallel ranges: the Partizansky (Partisan), the Siny (Blue), the Kholodny (Cold), and others. There are many karst caves in the South of Primorye. The relatively accessible Spyashchaya Krasavitsa cave (the Sleeping Beauty) in the Ussuriysky Nature Preserve could be recommended for tourists. There are comparatively well-preserved fragments of the ancient volcanoes in the area.

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