The Wall Street Journal has an amazing table of percentage of mortgage loans that are 90 days+ past due by zip code, using numbers from CoreLogic Inc. for zip codes with more than 5,000 mortgages.
Zip codes in college towns like 36830 in Auburn AL, 1.84%, 65203 in Columbia, MO 1.20%, 77845 in College Station, TX 1.24%, 80301 in Boulder, CO 1.58%, 68516 in Lincoln, NE 1.30%
Zip codes in boom (and now bust) towns like 89148 in Las Vegas 20.85%, 85041 in Phoenix 20.65%, 60639 in Chicago 24.14%, 30349 in Atlanta 19.33%, 33177 in Miami 33.81%