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...DuPage County   DuPage County   ... ... The DuPage County Board is the governing body of the County and consists of 25 members, five from each of the five County Board districts. The County provides a number of functions of importance to Hinsdale residents. These services include tax assessment and collection, courts, county clerk and recorder, highways, forest preserves, public health services, and the conduction of elections. ... DuPage County ... ... Address: ... 421 North County Farm Road, Wheaton, IL 60187 Telephone: 630.682.7282 Cook County . ... Address: ... County Clerk, 118 North Clark, Chicago, IL Telephone: 312.603.5656 ...             ... Forest Preserve Districts   ... ... DuPage - Headquarters ... ... Address: ... 185 Spring Avenue, Glen Ellyn, IL 60137 Mailing: P.O. Box 2339, Glen Ellyn, IL 60138 Info: More than 17,000 acres Telephone: 630.933.7200 Cook - Suburban Headquarters ... Address: ... 536 North Harlem Avenue, River Forest, IL Info: More than 60,000 acres Telephone: 800.870.3666 ...             ... Utilities   ... ... Electricity ... ... Company: ... Commonwealth Edison Company Info: Provides service based on a 30-day billing period. A nominal deposit is sometimes required. Telephone: 800.334.7661 Gas ... Address: ... Northern Illinois Gas Company-90 North Finley Road, Glen Ellyn, IL Info: Provides natural gas based on a 30-day billing period. Telephone: 888.642.6748 ...