Yarra Plenty Regional Library was founded in the mid 1960s, when the former City of Heidelberg agreed to provide library services to the former Shire of Eltham. Later the former Shire of Diamond Valley and the Shire of Whittlesea joined in the Regional group.
In 1995, following changes in local government boundaries, the new municipalities of Banyule, Nillumbik and Whittlesea continued their support for the regional library service and Yarra Plenty was one of the first regions incorporated under Section 196 of the Victorian Local Government Act 1989.
Yarra Plenty Regional Library enjoys a reputation as an innovative, progressive and effective library service. There are nine branch libraries located at Greensborough, Eltham, Ivanhoe, Lalor, Mill Park, Rosanna, Thomastown, Watsonia and Whittlesea, as well as three mobile libraries - the mobile library, Outreach Vehicle