According to city-data.com, the ten US counties with the highest percentage of people who admit to drinking alcohol within the last 30 days are:
1. Newport County, RI (Newport, Middletown, Portsmouth): 73.5%
2. Washington County, RI (North Kingstown, Westerly, Narragansett): 71.7%
3. Morris County, NJ (Morristown, Dover, Madison): 71.0%
4. Fairfield County, CT (Bridgeport, Stamford, Norwalk): 70.8%
5. Norfolk County, MA (Quincy, Brookline, Weymouth): 70.6%
6. Grafton County, NH (Lebanon, Hanover, Plymouth): 70.4%
7. Westchester County, NY (Yonkers, New Rochelle, Mount Vernon): 70.2%
8. Chester County, PA (West Chester, Phoenixville, Coatesville): 70.2%
9. Chittenden County, VT (Burlington, Colchester, South Burlington): 70.1%
10. Rockingham County, NH (Derry, Salem, Londonderry): 69.9%
Anyone else surprised they're all in the Northeast?
Here's a list of the top 100:
http://www.city-data.com/top2/co4.html