The resources below contain different type of market research and data. Mintel and Passport are similar in that they both have consumer market research but they differ in that Passport covers more countries and includes lots of raw data. But you will want to use both as there may be a product or market in one that is not in the other!
Nielsen Segmentation and Market Solutions provides demographic and lifestyle data. Data is available for lifestyles, consumer products and media. National, state, county and city data.
American Fact Finder is free from the U.S. government and is helpful for understanding basic demographics about people and businesses in the U.S.