For each week beginning on a given date, the figures show the number of sites that reported they are using the libraries 4.2.1 release.

Libraries API project page
libraries 4.2.1 release page
All Libraries API usage statistics
Usage statistics for all projects

Week starting Count
October 11th, 2026 12773
October 4th, 2026 3444

Only Drupal websites using the Update Status module are included in the data. Read more information about how these statistics are calculated.