The Aitkin Public Library, built in 1911, is the only East Central Regional Library branch to have received funds from the Andrew Carnegie Foundation. It served the Aitkin, Minnesota community until 1991 when a new library was built. Founded in 1959, ECRL is the oldest existing regional public library system in Minnesota. Headquartered in Cambridge, it is a consolidated library system with 14 libraries and Outreach Services and serves residents in Aitkin, Chisago, Isanti, Kanabec, Mille Lacs, and Pine counties.