San Diego County Library
（重定向自SDCL）
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- This library serves the unincorporated areas and cities within the county of San Diego which are outside San Diego city boundaries. For the library serving the city, see San Diego Public Library.
The San Diego County Library is a public library system serving San Diego County in the U.S. state of California. Any person living in the state is eligible for a free library card. During the 2009–2010 fiscal year, the library circulated over 10 million materials and had over 641,276 members.