Illinois State Profile
Population (2025): 12,710,000
Total Number of Natural Gas Utilities: 85
Number of Municipal Natural Gas Utilities: 64
Number of APGA Members: 41
Total Number of Customers (All Utilities): 4,300,000
Total Number of Customers (APGA Members): 50,558
Miles of Pipeline (All Utilities): 63,238
Miles of Pipeline (APGA Members): 1,203
*customer and miles data is self-reported as of early 2025
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