The Indigirka (Russian: Индиги́рка; Yakut: Индигиир, romanized: İndigîr) is a river in the Sakha Republic in Russia between the Yana to the west and the Kolyma to the east.

[1] The isolated village of Russkoye Ustye, located on the delta of the Indigirka, is known for the unique traditional culture of the Russian settlers whose ancestors came there several centuries ago.

In 1892–94 Baron Eduard Von Toll carried out geological surveys in the basin of the Indigirka (among other Far-eastern Siberian rivers) on behalf of the Russian Academy of Sciences.

At the point where it crosses the Chemalgin Range the river narrows and flows into a deep gorge, forming rapids.

Turning northwards, the Indigirka cuts deeply across the Moma Range and flows northeastwards meandering across the Aby Lowland and widening to 500 m (1,600 ft).

The Indigirka forms a large delta, consisting of a number of streams (each one being labeled on Russian maps as a photo ka (river arm)) and islands.

About 100 kilometres (62 mi) before reaching the East Siberian Sea (70°48′45″N 148°54′58″E / 70.8126°N 148.9162°E / 70.8126; 148.9162), the river splits into two major northeast-flowing streams.