"According to Hennen's American Public Library Ratings index, which Lake Oswego library officials call the definitive ranking of U.S. libraries, the city's library ranks just behind the Washington Centerville Public Library in Ohio and the Elmhurst Public Library in Illinois in categories such as number of visitors, staff, book circulation and hours the library is open.
[...]Lake Oswego placed third in the category of 911 cities with 25,000 to 49,000 population. Multnomah County Library in Portland and Corvallis-Benton County Public Library in Corvallis also scored in the Top 10 nationally in their population categories." [Read More @ The Oregonian]