American Community Survey 1-Year estimates with other data ?
ACS 1-year estimates with Census 2000
ACS 1-year estimates from different years.
Because ACS variables change over time, some areas and subjects must be compared with caution, or not compared at all.
Use the left navigation to get yearly guidance on specific topics/subjects.
ACS estimates with Census 2000?
ACS 1-year, 3-year or 5-year estimates with Census 2000 data.
Differences in the universe, question wording, residence rules, reference periods, and the way in which the data are tabulated can impact comparability with Census 2000.
Use our Table Comparison Lookup Tool to check for table-specific comparability.
ACS 3-year to 3-year and 5-year to 5-year?
The Census Bureau recommends that you:
DO compare similar period lengths, for example, 3-year to 3-year.
DON'T compare estimates from different period lengths, for example, 1-year to 3-year.
DO compare estimates from non-overlapping periods, for example, compare a 2005-2007 ACS 3-year estimate to a 2008-2010 ACS 3-year estimate.
DON'T compare overlapping periods, for example, the 2005-2007 ACS 3-year estimates to the 2006-2008 ACS 3-year estimates.