The GRES-2 Power Station (or Power Station Ekibastuz) is a coal-fueled power generating station in Ekibastuz, Kazakhstan. It is located close to Solnechny, by lake Shandaksor. The ashes of the station are dumped into nearby lake Karasor.

GRES-2, commissioned in 1987, has an installed capacity of 1,000 MWe and has the world's tallest flue-gas stack at 419.7 metres (1,377 ft) tall. The reinforced concrete chimney is about 40 m (130 ft) taller than the Inco Superstack in Sudbury, Ontario, Canada. It is the tallest chimney ever built.

The power station is the start of the Powerline Ekibastuz–Kokshetau and uses a transmission voltage of 1,150 kVAC, the highest transmission voltage in the world. The extension of this line to Chelyabinsk in Russia is also designed for 1,150 kV, but it currently operates at only 500 kV. About 3/4 of the energy produced by GRES-2 was exported to Russia.

Fifty percent of GRES-2 shares are owned by Inter RAO UES, and fifty percent by Kazakhstan's government.

The planned capacity of 4,000 MWe is to be provided by eight equal units, 500 MWe each.

• Unit 1 was launched into service in December 1990.
• Unit 2 was launched into service in December 1993.
• Construction of Unit 3 was started in 1990 but later stopped.

• Ekibastuz GRES-1
• List of chimneys
• List of towers
• List of tallest freestanding structures in the world
• Unfinished building
• List of tallest buildings and structures in the world

• Media related to Ekibastuz GRES-2 power station at Wikimedia Commons
• Smoke-stack diagrams
• GRES-2 official website Archived 22 July 2011 at the Wayback Machine
• GRES-2 Chimney at Structurae

Records
Preceded by Inco Superstack 380 m (1,250 ft)	World's tallest chimney 1987–present	Incumbent