Correction to Counties Served
During a review of the 2025 yearbook data, we identified two errors related to the percentage of counties served by local agencies and accompanying map. The estimated percentage of U.S. counties with at least one local agency with an evidence-based home visiting model was corrected to 52 percent from the original estimate of 65 percent.
The initial estimate had been inflated due to a coding error that resulted in the double-counting of counties with multiple local agencies where at least one local agency was in a zip code that spanned multiple counties. As of May 27, 2026, the corrected data are available in the Highlights and Location & Reach pages of the yearbook and in the downloadable Yearbook Summary and Dissemination Toolkit documents.
Additionally, the county-level map was revised to shade an additional 213 counties served that had accidentally been omitted in the original release.
Considering a Different Definition of Reach
These corrections allowed us to reflect on whether we were choosing the best metric to depict the reach of evidence-based home visiting. Since our initial yearbook, we have collected geographic data about counties with at least one local agency implementing an evidence-based home visiting model based on their office address. This emphasis on agency location overlooks the reality that most local agencies serve families in nearby—and sometimes distant—communities. For this reason, we created a new reach metric that focuses on where families live, using zip code and county service data collected since the 2019 yearbook. Within this new framing, we calculated that families received evidence-based home visiting services in 85 percent of counties in 2024.