The Plainfield Public Library District serves residents and businesses of the village of Plainfield, Illinois and surrounding area. The library district's current population is in excess of 60,000 residents. The library is located at 15025 S. Illinois Street, Plainfield, IL 60544 near crossings of Lincoln Highway and U.S. Route 66 The street numbering convention was recently changed. The library's address under the old system was 705 N. Illinois St.
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