The Princeton Area Library opened in a new building overlooking the Rum River on August 24, 1990. East Central Regional Library is a consolidated library system in Minnesota serving Aitkin, Chisago, Isanti, Kanabec, Mille Lacs, and Pine counties.
The Princeton Area Library has been located in its current space downtown since 1990. 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.
The Princeton Area Library was located in the former railroad depot several blocks west of downtown from 1976 to 1995, sharing the building with the local historical society. East Central Regional Library is a consolidated library system in Minnesota serving Aitkin, Chisago, Isanti, Kanabec, Mille Lacs, and Pine counties.