STATS Cape Cod - Statistics & Demographics for Cape Cod - Huge Resource for economic & demographic data - Profiles, Benchmarks, Data by Towns, including all Towns & Counties in Massachusetts
ZIPWHO.com - Demographic Info - The most fun you can legally have with ZIP codes!
Point to Homes Cape Cod - Demographics by Town for Population, Households, Marital Status, Income, Financial, Lifestyle, Employment, Education, Weather + Martha's Vineyard + Nantucket