The Iomrautvaam (Russian: Иомраутваам; Chukot: Емрауткенваам) is a river in Chukotka Autonomous Okrug, Russia. The length of the river is 103 kilometres (64 mi) and the area of is drainage basin 1,310 square kilometres (510 sq mi).

The Iomrautvaam is the longest tributary of the Khatyrka river.

The Iomrautvaam has its source in the Komeutyuyam Range of the Koryak Highlands. It flows in a roughly northeastern direction in the northern section of the range. Finally it meets the right bank of the Khatyrka 100 kilometres (62 mi) from its mouth, close to the northeastern end of the ridge.

The Khatyrka meteorite, a unique-type of meteorite fell in the area of the Iomrautvaam river basin at 62°39′11″N 174°30′02″E / 62.65306°N 174.50056°E / 62.65306; 174.50056. It was found during an expedition to Chukotka in the summer of 2011 buried in a 7,000-year-old layer of dirt and was named Khatyrka meteorite.

The river basin is characterized by tundra vegetation, including mosses, lichens, dwarf shrubs, and sedges.

• Khatyrkite
• List of rivers of Russia

• Astronomy.com - An old meteor yields a new surprise: a never-before-seen material
• Collisions in outer space produced an icosahedral phase in the Khatyrka meteorite never observed previously in the laboratory
• Khatyrka meteorite found to have third quasicrystal
• The Penzhina-West Kamchatka folded zone and the Ukelayat-Sredinnyi block in the structure of the Koryak Highland and Kamchatka