Normalized to 2020 Boundaries

As geographic boundaries change over time, our normalized data product line adjusts for these changes to allow for apple-to-apple comparisons of census data from 1970, 1980, 1990, 2000 and 2010 to the 2020 boundaries.

We offer the full decentenial census normalized to the 2020 boundaries for 1970, 1980, 1990, 2000 and then the American Community Survery for 2010.  Alternatively if you want Tract level data the Neighborhood Change Database has a subset of about 1000 variables from 1970, 1980, 1990, 2000, 2010 and coming in early 2024 the 2020 census.