Driven by state renewable energy mandates, fourteen states have installed over 1,000 MW of wind capacity, and a total of 37 states now have installed at least some large-scale wind power. Texas, with 10,135 MW of capacity, has the most installed wind power capacity of any U.S. state, followed by Iowa with 3,675 MW. The Roscoe Wind Farm (781 MW) in Texas is the largest wind farm in the US as of 2011.