As of January 1, 2022, there are 11,925 utility-scale electric power plants in the United States. Utility scale power plants have atleast 1 megawatt of generation capacity.
For reference, the average home solar panel system has a generation capacity of 250 - 400 watts. So utility scale electric plants produce a significant amount of power.
Some power plants have more than one generator.
As of January 1, 2022 there are 24,645 electric generators in the United States.
Here is a breakdown of power plants by type in the United States:
Source: EIA Table 4.1. Count of Electric Power Industry Power Plants, by Sector, by Predominant Energy Sources within Plant, 2011 through 2021