And soon, solar too.

The United States surpassed Germany in 2008 to become the leader in installed wind turbine power production. Mind you, the United States is also quite a bit larger than Germany, which now occupies the number two spot.
Reuters tells us:

The United States overtook Germany as the biggest producer of wind power last year, new figures showed, and will likely take the lead in solar power this year, analysts said on Monday.

Even before an expected "Obama bounce" from a new President who has vowed to boost clean energy, U.S. wind power capacity surged 50 percent last year to 25 gigwatts (GW) -- enough to power more than five million homes.

Globally, wind power grew 29 percent and accounted for 121 gigawatts. As far as solar goes, it is predicted that the United States will take that title this year.