The Taymyr Gulf (Russian: Таймырская губа, or Taymyrskaya Guba) is a gulf in the Kara Sea that includes the estuary of the Lower Taymyr River. The estuary opens roughly northwestwise from the western coast of the Taymyr Peninsula into the eastern expanses of the Kara Sea, widening from about 4 km at the river's mouth to about 20 km. Its length, including the wider gulf, is about 50 km, and its width roughly 40 km.
Taymyr Island is located about 60 km westwards from the mouth of the estuary.
The climate in the desolate area of the Taymyr Gulf is severe, with long and bitter winters and frequent blizzards and gales. The estuary proper is frozen for about nine months in a year and even in summer it is never quite free of ice floes. Fishes like the golets and the muksun are very common in its waters.
The most important islands in the Taymyr Gulf are the following:
- Chelyuskin Island is the first island at the mouth of the gulf.
- Bera Island or Baer Island (Остров Бера) is 3.5 km long. It is located in the middle of the mouth of the gulf, abaout 13 km from the Kara Sea Baltic-German scholar Karl Ernst von Baer. Baer made important contributions to the research of Arctic meteorology between 1830 and 1840. . This island was named after
- The Nanosnyye Islands are four small islands, the largest of which is 5 km long and 2 km wide. They are located in the mouth of the estuary, right at the opening of the gulf.
- Fomin Island (Остров Фомин) is 11.5 km long and 3.7 km wide. It is located deep within the estuary, dividing the last stretch of the Taymyr River into two branches. Nikifor Fomin. . This island was named after early Russian Arctic explorer
In the 1740s, during the Great Northern Expedition, Nikifor Fomin reached Bera Island and built a hut in order to winter there.
The Taymyr Gulf and its islands were explored by Alexander von Middendorff during his expedition to Siberia (1842–1845). Bera Island was the farthest northern point he reached after exploring the Taymyr River from the south towards its estuary in August 1843.
Baron Eduard von Toll during his last expedition, the Russian Polar Expedition of 1900-1903, explored the mouth of the Taymyr Gulf. Toll found a quartz boulder on Bera Island that had been described by Middendorff. He also found the remains of Nikifor Fomin's hut.
Nowadays the Taymyr Gulf is part of the Great Arctic State Nature Reserve, the largest nature reserve of Russia.
- Nature Reserve: 
- Islands in the gulf
- exploration of the Taymyr Gulf and its islands
- William Barr (Arctic historian), Baron Eduard von Toll's Last Expedition: The Russian Polar Expedition, 1900-1903