Cleanview

Nuclear power plants in Washington

Washington has 1 operating nuclear power plants with 1.2 GW of capacity.

  • Operating1
SeattleSpokaneYakimaWenatcheeQuincy

Under 250 MW250–999 MW1 GW and up

Updated monthly. Last updated November 2026.

The largest nuclear power plants in Washington

Operating, by capacity

#Nuclear power plantYear onlineCapacity
1Columbia Generating Station19841,200 MW

Nuclear power plants that came online most recently in Washington

Newest first

#Nuclear power plantYear onlineCapacity
1Columbia Generating Station19841,200 MW
The developer behind each project is on paid plans. See plans

How Cleanview tracks nuclear power plants

Operating nuclear power plants come from the EIA's monthly survey of power plants. Planned projects come from the grid operators' interconnection queues. We research who is developing each one, since a queue lists a project company, not its owner.

Questions about nuclear power plants in Washington

How many nuclear power plants are in Washington?
Washington has 1 operating utility-scale nuclear power plants with 1.2 GW of capacity, according to the EIA's monthly survey of power plants.
What is the largest nuclear power plant in Washington?
Columbia Generating Station in Benton County, Washington is the largest, at 1,200 MW. It came online in 1984.
How many nuclear power plants were built in Washington in 2025?
0 nuclear power plants came online in Washington in 2025, with 0 MW of capacity.
Who is developing nuclear power plants in Washington?
Interconnection queues list each project under a project company, not the developer behind it. Cleanview researches the developer of every project and has them on paid plans.

More energy trackers for Washington

Nuclear power plants in other states

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