Dayton Metro Library is a multi-branch library system serving 476,000 residents of the Dayton Metropolitan Area. It has 21 locations across the area (as well as two bookmobiles). Over 7.6 million items were checked out in 2008. The Dayton Metro Library ranks in the top ten best libraries in the United States serving a population of over 250,000 by HAPLR. The Dayton Metro Library system is considered a county system with branches in cities and towns throughout Montgomery County, Ohio, but does not have branches in Centerville, Germantown, Oakwood, Riverside or Washington Township. All are serviced by libraries of their own, save Riverside, various parts of which are geographically close to Dayton Metro Library locations, including Burkhardt, Electra C. Doren and Huber Heights.