ACS has non-overlapping datasets that allow comparisons of current ACS data to past ACS data.  The 2017-2023 ACS 5-Year estimates can be compared with 2012-2016 ACS 5-Year estimates.  For information on comparability of the 2017-2023 ACS 5-Year estimates to the 2012-2016 estimates by topic, please visit the Comparing 2023 American Community Survey Data page.

Variables, and the values they represent, may change over time. Use this 2023 5YR API Changes document as a guide for which variables have changed from the prior year for 2023 ACS 5-Year Detailed Tables, Data Profiles and Subject Tables. See below for a description of each change type.

• No Change - The variable has not changed from the prior year (most variables).
• Updated - That variable has changed from the prior year and a matching variable for the current year has been found.
• No Match - The variable has changed from the prior year and no matching or comparable variable has been found.

For table changes, check the ACS product changes webpage for source table changes.

With the 2023 ACS 5-Year data now available, please note that there are label changes to some geographies found in the 2023 5-Year ACS API.  While there are no underlying changes to how these geographies are defined, the change in the label does impact the syntax of the geography portion of the API queries, meaning that queries using these geographies from the 2020 5-Year ACS or earlier will not work.  If you use any of these geographies in your queries, please be sure to update the geographic syntax prior to retrieving data from the 2023 5-Year ACS API.

The impacted geographies are: CLICK HERE.