Hydropower is obtained from the force of water flowing in streams and rivers producing mechanical energy. Hydropower was an early source of energy used for electricity generation. Until 2019, hydropower was the largest source of total annual American renewable electricity production.
In 2020, 7.3% of all the electricity generated in the US came from hydropower. From all the renewable sources, it represents the 37% (293 billion kilowatt-hours). Here is a chart that shows the data:
For further information read this article