U.S. Wind Power Capacity - NREL and AWS Truewind Report

AntronX

...is 10,459 GW installed capacity at 30% capacity factor, covering 26.89% of the 48 state area. For comparison, current U.S. electrical generation capacity is 850 GW at 53% capacity factor, or 450 GW continuous annual average.

As of end 2009 U.S. got 35 GW of wind installed. That's 0.33% of available land area.

Links:

http://www.windpoweringamerica.gov/filter_detail.asp?itemid=2542

http://awea.org/newsroom/releases/02-18-10_US_Wind_Resource_Larger.html

1 GW (Giga Watt) = 1000 MW (Mega Watt) = 1,000,000 KW (Kilo Watt)