The American Wind energy Association released their 2005 Wind Industry Ranking Report: "The rankings, which include the leading states for wind energy development, the suppliers of wind energy turbines, and owners and purchasers of wind energy, provide a useful measure of the size and breadth of the American wind energy industry. The industry easily broke earlier records in 2005, installing over 2,400 megawatts (MW) or over $3 billion worth of new generating equipment in 22 states." A summary table from the report shows:

States with most wind energy installed, by capacity (MW):

#1 California - 2,150 MW
#2 Texas - 1,995 MW
#3 Iowa - 836 MW
#4 Minnesota - 744 MW
#5 Oklahoma - 475 MW
#6 New Mexico - 407 MW
#7 Washington - 390 MW
#8 Oregon - 338 MW
#9 Wyoming - 288 MW
#10 Kansas - 264 MW

Assuming that 4000 MW provides power to about 1 Million homes:
#1 California - 540,000 Homes
#2 Texas - 500,000 Homes
#3 Iowa - 210,000 Homes
#4 Minnesota - 190,000 Homes
#5 Oklahoma - 120,000 Homes
#6 New Mexico - 100,000 Homes
#7 Washington - 100,000 Homes
#8 Oregon - 80,000 Homes
#9 Wyoming - 70,000 Homes
#10 Kansas - 70,000 Homes

Wind Industry Report March 2006