Washington
power plants.
Washington has 72 operating power plants in the catalog, 29,032 MW in all. The catalog also marks 3 plants as Retired, with 1,900 MW of capacity. Its operating fleet leans on hydro, which accounts for 77% of operating capacity, with natural gas second at 13%. The largest operating plant in the catalog is Nathaniel Washington Hydroelectric Plant (4,215 MW, recorded start year 1975).
Source: Global Energy Monitor, Global Integrated Power Tracker, March 2026 release II. Catalog content date: .
Source: Global Energy Monitor, Global Integrated Power Tracker, March 2026 release II. Catalog content date: .
Washington electricity mix
Operating installed capacity by fuel. Each row gives megawatts and its share of the operating total.
Source: Global Energy Monitor, Global Integrated Power Tracker, March 2026 release II. Catalog content date: .
Largest plants in Washington
Source: Global Energy Monitor, Global Integrated Power Tracker, March 2026 release II. Catalog content date: .
Newest plants in Washington
Operating plants with the most recent recorded start years. The catalog records years, not full commissioning dates.
Source: Global Energy Monitor, Global Integrated Power Tracker, March 2026 release II. Catalog content date: .
Frequently asked questions
Where does Washington get its electricity?
Across the 72 operating plants in the catalog, capacity is led by hydro at 77%, then natural gas at 13%. These are installed-capacity shares, not live generation.
What is the largest power plant in Washington?
The largest operating plant in the catalog for Washington is Nathaniel Washington Hydroelectric Plant, a hydro facility with 4,215 MW and a recorded start year of 1975.
How many power plants are in Washington?
The catalog tracks 72 operating power plants in Washington, with 29,032 MW in all. It also marks 3 plants as Retired, with 1,900 MW of capacity.