In the south, along the Amur River and in what is now western Primorsky Krai, was the border with the Republic of China and, since 1931, the state of Manchukuo.

Geographically, its borders were based on the coasts of the Pacific and Arctic Oceans, on the one hand, and the watersheds of the rivers flowing into them, on the other.

The geographic unity of the region was ensured by its maritime location, and the whole of its main territory was closely connected, first of all, with the Pacific Ocean.

The scale of the Far Eastern Krai was such that from west to east there was a transition from the continental landscape of dry steppes of the Transbaikal to the island landscapes of Sakhalin, Kamchatka and the Commander Islands, and from north to south the ice of Wrangel Island, tundra, taiga and southern landscapes of what is now Primorsky Krai were successively replaced.

The Far Eastern Krai had a very diverse ecosystem, including walruses, seals, reindeer, moose, camels, Siberian tigers, leopards, forest cats, river turtles, and whales.