Found a link to this thread from 07...and I have added about 300 new courses since then to my list...making 635 total.
AL-8, AZ-5, CA-34, CO-26, CT-10, DE-1, FL-28, GA-3, HI-13, ID-7, IL-6, IN-19, KS-2, LA-1, KY-1, ME-32, MD-11
MA-131, MI-4, MO-10, MT-2, NE-4, NV-7, NH-23, NJ-8, NM-3, NY-39, NC-53, OH-1, OK-3, OR-4, PA-19, RI-11
SC-8, TX-3, UT-2, US Virgin Islands-1, VT-22, VA-1, WA-6, WV-2, WI-2, WY-1.
Barbados-1, Bermuda-6, Canada-4 (NB-2, BC-1, ON-1), Curacao-1, Germany-1, Ireland-18, Mexico-3, Scotland-25
42 states, 1 territory, 8 non-US countries.
I have visited many other countries where I have never played golf (maybe 15 or so), but I think I have played golf now in every state where I have set foot (no, airports don't count). I have yet to make a non-airport visit to AK, AR, IA, MN, MS, ND, SD, and TN. Virginia is the state where I have spent the most physical time playing only one round...I'm usually there for a week each year in the winter, in the mountains.