When they show state-level Census data, its for California. They provide numbers and even maps with information on where people and business are, their growth patterns, and dozen of other useful pieces of information. Under households you can get maps or tables on single-parent families, household incomes, or property values. They also do custom research for low rates. Lookup giudes you through building tables on individual and families.
Access is limited to member institutions.
Individual Level Databases and Data Archives General Social Survey Resources developed at Queens College Imagine having a representative sample of Americans from the 70's to today answering questions about themselves, their opinions, and their work. You've got it here. GenSoc - the General Social Survey provides such information, and Queens College provides the GenSoc datasets for free, as well as a free data extraction program. The samples are cross-sectional, not longintudinal, but there are some great questions. The Panel Study of Income Dynamics Gives details of using thre PSID, as well as the codebooks for this longitudinal study started in 1968.