Atikokan Generating Station is a biomass power plant owned by Ontario Power Generation (OPG) located 8 km (5 mi) north of Atikokan, Ontario (190 km (118 mi) west of Thunder Bay). The plant employs 90 people. The Atikokan Generating Station began operation as a coal fired station in 1985 and underwent an overhaul in the autumn of 2003.

Until 2012, it had one coal-fueled generating unit with low nitrogen oxide (NOx) burners, providing a peak output of 230 MW fuelled by low-sulfur lignite coal from the Ravenscrag Formation in Southern Saskatchewan.

In late 2012, the facility powered down and underwent renovations, due to the Ontario government's initiative to eliminate all coal-fired electricity generation. It is the first generating station to be converted by OPG to be fueled by biomass, and is North America's largest purely biomass-fueled power plant. The conversion came at a cost of C$200 million, and the plant was re-opened on 10 September 2014.

Annual production at the plant is approximately 900 million kilowatt-hours (kWh), enough energy to supply approximately 70,000 households for one year. The station occupies an area of 300 ha (741 acres). The plant's chimney is 145 m (476 ft) tall, and the steam temperature is 538 °C (1,000 °F). This plant is connected to the provincial power grid via several 230,000-volt transmission lines.

Greenhouse Gases (2012)

Greenhouse gas	Sum (tonnes)	Sum (tonnes CO2e*)
CO2	46,684	46,684
CH4	1.22	26
N2O	0.92	286
Total	-	46,996

*Calculated figures for CO₂e are rounded to the nearest tonne.

Total emissions, 2004-2020

Year	Emissions (tonnes CO2e)
2004	1,181,122
2005	1,108,437
2006	851,094
2007	754,148
2008	413,639
2009	200,393
2010	501,830
2011	78,078
2012	46,996
2013	0
2014	0
2015	48,070
2016	29,219
2017	18,138
2018	19,645
2019	17,022
2020	17,104

• Thunder Bay Generating Station
• Kakabeka Generating Station
• List of power stations in Canada
• List of tallest smokestacks in Canada

• Ontario Power Generation: Atikokan Generating Station