Quick summary: about 34% natural gas, 30% coal, 20% nuclear, 15% renewables, 1% other. Coal is on a pretty strong downward trend so expect that number to go down, and others to go up.
Of course, it's a big country so your local power generation is probably more relevant. You can find out about your local generating mix here: https://oaspub.epa.gov/powpro/ept_pack.charts
Quick summary: about 34% natural gas, 30% coal, 20% nuclear, 15% renewables, 1% other. Coal is on a pretty strong downward trend so expect that number to go down, and others to go up.
Of course, it's a big country so your local power generation is probably more relevant. You can find out about your local generating mix here: https://oaspub.epa.gov/powpro/ept_pack.charts