I need to harmonize ACS 5-year estimates to 2010 Census tracts for a number of measures (just covering Chicago area) for all overlapping estimates from 2005-2024. I’ve listed all the source tables I am working with below. For 2016-2020 through 2020-2024 I successfully used the crosswalk from 2020 block groups to 2010 census tracts for all measures. However, I cannot see a way to harmonize the 2005-2009 ACS 5-year estimates to 2010 tracts. The crosswalks table in FAQs seems to indicate that only 2000block-group-parts>2010tracts is available, and I can’t see a way to relate block groups to block group parts. Is there a way to use the 2000 Block Group Parts crosswalk for 2010 tracts with the ACS 2005-2009 estimates?
Source tables for measures: B01003, B15003, B02001, B03003, B99051 B19301, B23025, B07201, B25044, B08303, B08135, B08301
Thank you for any guidance!
In the Crosswalks for Non-Census Years section of the crosswalks page, we note:
… we have not yet added crosswalks for 2009, so the crosswalks cannot be used with all data from the earliest release of ACS 5-year estimates, covering 2005-2009. (Most of the block groups and tracts identified in the 2009 5-Year ACS summary tables correspond to the 2000 census definitions, but according to ACS documentation, “in 19 counties from 8 different states, many of the census tracts and block groups used to tabulate and present the 2005-2009 ACS 5-year estimates are either those submitted to the Census Bureau for the 2010 Census, or a preliminary version of 2010 Census definitions.”) We may add crosswalks for 2009 in a future release.
Some other users have inquired about this, so it’s increasingly likely that we’ll prioritize this soon, but we don’t yet have near-term plans to add these. See this prior post for an idea about how you could use block-level crosswalks to build a crosswalk for this situation.