(Purchase figures are based on annualized Partner contract amounts (kilowatt-hours), not calendar year totals.)
For absolute amount of green power, the hands-down green power winner was Bellingham, Washington, with 81,000,000 "green" KwH purchased annually. For portion of total demand met with green power (14%) , it's Swarthmore PA, home of Swarthmore College.
In the run-up to the 2004 US elections, DC pundits divided the US into "Red States" and "Blue States." Now we have Green communities; and eventually we'll have Green States. The color thing gets pretty muddled when you consider that three of the sixteen communities on the list, Alta, Moab, and Park City, are in the State of Utah, which, overall, gets 93% of its power from coal!
Image credit::Mobile Data Force blog, Bellingham WA USA