Power Plants in Missouri

Missouri holds 23.4 GW of generating capacity as of May 2026, ranking 21st among the 51 largest power-producing regions. Coal plants account for 41.2% of the state's capacity across 8 facilities, while natural gas provides 26.4% through 35 plants. Wind contributes 10.5% and solar 6.8%, with wind spread across 14 plants and solar across 37. Nuclear makes up 5.3% through a single unit, and hydro adds 4.7% across 8 plants. The remaining 5.0% comes from other sources across 35 plants. Battery storage contributes a nominal 1 MW. What the fleet could produce running flat out — nameplate capacity — differs from actual generation, which varies by fuel type and seasonality.

The five largest plants are Labadie, a coal station with 2,389 MW that came online in 1970; Iatan, a coal plant of 1,754 MW from 1980; New Madrid, another coal facility with 1,300 MW from 1972; Callaway, the state's only nuclear plant at 1,236 MW built in 1984; and Thomas Hill, a coal station of 1,182 MW from 1966. Together these five account for roughly a third of the state's total capacity. The fleet spans from Niangua, which came online in November 1930, to Kelso 2 Solar, which entered service in January 2026, a span of more than nine decades of plant ages running in parallel.