State library agencies continue to develop digital libraries to provide statewide access network-based service, resources, and programs to a wide range of users. These libraries can include online databases, e-books, digitized collections, and services such as digital reference. The panel identifies evaluation strategies, methods, and issues that assist developers and researchers assess the extent to which such libraries meet stated goals and objectives and user information needs. In particular, the panel presents findings from studies conducted by the authors with the Florida Electronic Library and Library of Texas initiatives.