The ACS is an ongoing sample survey which began in 2005. Questions asked cover:
•age
•sex
•race
•family and relationships
•income and benefits
•health insurance
•education
•veteran status
•disabilities
•where you work and how you get there
•where you live and how much you pay for some essentials
•and other topics related to people, households, families and housing
data.census.gov is the main data portal for US Census data. It contains data from the 2010 decennial census as well as the ACS from 2010 to present. New updates to census data will be available through data.census.gov