The Mustang Library is a branch of the Scottsdale Public Library that serves over 240,000 residents in the city of Scottsdale in Maricopa County, Arizona. The library system maintains more than 490,600 volumes and circulates over 2.9 million items per year, including books, magazines, newspapers, research materials, music, movies, and downloadable resources. It opened its doors in 1987 and occupies a 31,850-square-foot building with 35 computers for public use.