Got this from a google search on the interweb:
This Top Ten German Kolsch list is from America's Top Ten and from the results of the 2011 U.S. Open Beer Championship.
1. Sunner Kolsch - Gebr. Sünner GmbH & Co, Germany
2. Endless River – Mother Earth Brewing, North Carolina
3. Kolsch - Big Bear Brewing, Florida
4. Zommerfest - August Schell Brewing - Minnesota
5. Harpoon Summer Beer - Harpoon Summer Beer - Massachusetts
6. Crystal Ale - Big Sky Brewing - Montana
7. Geary's Summer Ale - Geary's Brewing - Vermont
8. Gaffel Kölsch - Privabrauerei Gaffel Becker - Germany
9. Alaskan Summer Ale - Alaskan Brewing - Alaska
10. Gold Spike Ale - Berkshire Brewing - Massachusetts
Not sure how many were entered, of course, but hey, it is probably a pretty good sample.
Cheers to Kolsch. Love them beers.