Mount Sibayak
Gunung Sibayak (Indonesian) Deleng Sibayak (Karo)
Sibayak seen from the Southeast
Highest point
Elevation	2,181 m (7,156 ft)
Listing	Ribu
Coordinates	3°14′21″N 98°30′20″E / 3.23917°N 98.50556°E / 3.23917; 98.50556
Geography
Mount Sibayak Sumatra, Indonesia
Geology
Mountain type	Stratovolcano
Last eruption	1881

Mount Sibayak (Indonesian: Gunung Sibayak) is a stratovolcano overlooking the town of Berastagi in northern Sumatra, Indonesia. Although its last eruption was more than a century ago, geothermal activity in the form of steam vents and hot springs remains high on and around the volcano. The vents produce crystalline sulfur, which was mined on a small scale in the past. Seepage of sulfurous gases has also caused acidic discolouration of the small crater lake.

Sibayak is a term from the Karo Batak language referring to a founding community. Mount Sibayak is relatively easy to climb and has been a tourist attraction since colonial times.

• 
  Crater of Gunung Sibayak. Mount Sinabung in the back.
• 
  Mount Sibayak in the 1920s
• 
  The "Sibajak raja berampat", the so-called four princes with their wives, Karolanden, North Sumatra (1914–1919)

On July 11, 1979, a Fokker F28 operating under Garuda Airlines crashed in Mount Sibayak.

• List of volcanoes in Indonesia

• "Sibayak". Global Volcanism Program. Smithsonian Institution.

• Media related to Sibayak at Wikimedia Commons
• Photos of gunung Sibayak and gunung Sinabung