Cleanview

Nuclear power plants in NYISO

NYISO has 3 operating nuclear power plants with 3.4 GW of capacity.

  • Operating3

Under 250 MW250–999 MW1 GW and up

Updated monthly. Last updated November 2026.

The largest nuclear power plants in NYISO

Operating, by capacity

#Nuclear power plantYear onlineCapacity
1Nine Mile Point Nuclear Station19871,901 MW
2James A Fitzpatrick1976883 MW
3R E Ginna Nuclear Power Plant1970614 MW

Nuclear power plants that came online most recently in NYISO

Newest first

#Nuclear power plantYear onlineCapacity
1Nine Mile Point Nuclear Station19871,901 MW
2James A Fitzpatrick1976883 MW
3R E Ginna Nuclear Power Plant1970614 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 NYISO

How many nuclear power plants are in NYISO?
NYISO has 3 operating utility-scale nuclear power plants with 3.4 GW of capacity, according to the EIA's monthly survey of power plants.
What is the largest nuclear power plant in NYISO?
Nine Mile Point Nuclear Station in Oswego County, New York is the largest, at 1,901 MW. It came online in 1987.
How many nuclear power plants were built in NYISO in 2025?
0 nuclear power plants came online in NYISO in 2025, with 0 MW of capacity.
Who is developing nuclear power plants in NYISO?
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 NYISO

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