How many nuclear power plants are in the United States, and where are they located?

As of March 2026, the United States had 94 operating commercial nuclear power reactors at 54 power plants in in 28 states*. Illinois has 11 reactors, the most of any state, with a total net summer electricity generating capacity of 11,592 megawatts (MW), which is 12% of total U.S. operating nuclear electricity generation capacity.

Of the 54 operating nuclear power plants:

19 have one reactor

31 have two reactors

3 have three reactors

1 has four reactors

The Alvin W. Vogtle Electric Generating Plant in Georgia is the largest U.S. nuclear power plant. It has:

Four reactors

Total nameplate electricity generating capacity of about 4,658 MW

Total net summer electricity generating capacity of 4,530 MW

The R.E. Ginna Nuclear Power Plant in New York is the smallest nuclear facility. It has:

One reactor

Nameplate generation capacity of 614 MW

Net summer generation capacity of about 582 MW

The smallest individual reactors are the two units at the Prairie Island Nuclear Generating Plant in Minnesota, which each have about 593 MW nameplate generation capacity and about 520 MW of net summer generation capacity.

The newest nuclear reactor to enter service is the Vogtle Unit 4 at the Alvin W. Vogtle Electric Generating Plant in Georgia, which began commercial operation in April 2024 and has 1,114 MW nameplate electricity generating capacity.

*Data note: The operators of two power plants, Palisades in Michigan and Crane Energy Center (formerly Three Mile Island) in Pennsylvania, plan to bring their reactors back online. EIA’s survey of electricity generating units currently categorizes those reactors as operating but “out of service” rather than planned or retired.