Program Information The County of Los Angeles Public Library is one of the major libraries of our nation, and provides library service to over 3.4 million residents living in unincorporated areas and to residents of 49 of the 88 incorporated cities of Los Angeles County. The service area extends over 3,000 square miles. Supplementing the 7.5 million volume book collection, the Library also offers magazines, newspapers, government publications and many specialized materials including online databases.